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  #2  
1st September 2015, 03:05 PM
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Join Date: May 2012
Re: Question Bank for KCET

Karnataka Common Entrance Test (KCET) Physics examination question paper contains questions from following topics:

Behavior of Perfect Gas & Kinetic Theory of gases
Gravitation
Kinematics
Laws of Motion
Motion of System of particles & Rigid Body
Oscillations & Waves
Physical World & Measurement
Practical Oriented questions
Properties of Bulk Matter
Thermodynamics
Work, Energy & Power

Question paper;

1. The speed of light in media M1 and M2 are 1.5  108 ms-1

travels from medium M1 to the medium M2 with an angle of incidence . The ray suffers total

internal reflection. Then the value of the angle of incidence  is

(1) > sin-1

Ans: (1)

2. Which of the following phenomena support the wave theory of light?

a) scattering

b) interference

c) diffraction

d) velocity of light in a denser medium is less than the velocity of light in the rarer medium

(1) a, b, c (2) a, b, d (3) b, c, d (4) a, c, d

Ans: (3)

3. White light reflected from a soap film (Refractive Index = 1.5) has a maxima at 600 nm and

a minima at 450 nm with no minimum in between. Then the thickness of the film is _______

 10-7 m

(1) 1 (2) 2 (3) 3 (4) 4

Ans: (3)

4. A cylindrical tube of length 0.2 m and radius R with sugar solution of concentration “C”

produce a rotation of  in the plane of vibration of a plane polarized light. The same sugar

solution is transferred to another tube of length 0.3 m of same radius. The remaining gap is

filled by distilled water. Now the optical rotation produced is

(1)  (2) 2

Ans: (1)

5. Radii of curvature of a converging lens are in the ratio 1 : 2. Its focal length is 6 cm and

refractive index is 1.5. Then its radii of curvature are ____ respectively.

(1) 9 cm and 18 cm (2) 6 cm and 12 cm (3) 3 cm and 6 cm (4) 4.5 cm and 9 cm

Ans: (4)

6. A small oil drop of mass 10-6

having a potential difference of 500 V. The charge on the drop is ________ (g = 10 ms-2

(1) 2  10-9 C (2) 2  10-11 C (3) 2  10-6 C (4) 2  10-8 C

Ans: (2)

7. A uniform electric field in the plane of the paper as shown. Here A, B, C, D are the points on

the circle. V1, V2, V3, V4 are the potentials at those points

respectively. Then

(1) VA = VC, VB = VD

(2) VA = VC, VB > VD

(3) VA > VC, VB > VD

(4) VA = VB, VC = VD





3









4

(2) < sin-1

Ans: (None of the option matching)

8. Two metal spheres of radii 0.01 m and 0.02 m are given a charge of 15 mC and 45 mC

respectively. They are then connected by a wire. The final charge on the first sphere is

______  10-3 C

(1) 40 (2) 30 (3) 20 (4) 10

Ans: (3)

9. The concentric spheres of radii R and r have positive charges q1 and q2 with equal surface

charge densities. What is the electric potential at their common centre?

(1)

o

Ans: (1)

10. When an additional charge of 2C is given to a capacitor, energy stored in it is increased by

21%. The original charge of the capacitor is

(1) 30 C (2) 40 C (3) 10 C (4) 20 C

Ans: (4)

11. When a potential difference of 103 V is applied between A and B, a charge of 0.75 mC is

stored in the system of capacitors as shown. The

value of C is (in F)

1

(1)

2

(2) 2

(3) 2.5

(4) 3

Ans: (2)



(R + r) (2)

12. See the diagram. Area of each plate is 2.0 m2

is given to Q. Then the potential of Q becomes

(1) 13 V

(2) 10 V

(3) 6.67 V

(4) 8.825 V

Ans: (3)

13. Three conductors draw currents of 1A, 2A and 3A respectively, when connected in turn across

a battery. If they are connected in series and the combination is connected across the same

battery, the current drawn will be

2

(1)

7

Ans: (None of the options matching)

A (2)

14. In the circuit, R1 = R2. The value of E and R1 are _____ (E – EMF, R1 – resistance)

(1) 180 V, 60 

(2) 120 V, 60 

(3) 180 V, 10 

(4) 120 V, 10 

Ans: (Data insufficient)

15. Masses of three wires of copper are in the ratio of 1 : 3 : 5 and their lengths are in the ratio

of 5 : 3 : 1. The ratio of their electrical resistances is

(1) 1 : 3 : 5 (2) 5 : 3 : 1 (3) 1 : 15 : 125 (4) 125 : 15 : 1

Ans: (4)

16. For a transformed, the turns ratio is 3 and its efficiency is 0.75. The current flowing in the

primary coil is 2 A and the voltage applied to it is 100 V. Then the voltage and the current

flowing in the secondary coil are _______ respectively.

(1) 150 V, 1.5 A (2) 300 V, 0.5 A (3) 300 V, 1.5 A (4) 150 V, 0.5 A

Ans: (2)

17. A proton and helium nucleus are shot into a magnetic field at right angles to the field with

same kinetic energy. Then the ratio of their radii is

(1) 1 : 1 (2) 1 : 2 (3) 2 : 1 (4) 1 : 4

Ans: (1)

18. Two identical circular coils A and B are kept on a horizontal tube side by side without

touching each other. If the current in the coil A increases with time, in response, the coil B

(1) is attracted by A (2) remains stationary (3) is repelled (4) rotates

Ans: (3)

19. In the diagram, I1, I2 are the strength of the currents in the loop and straight conductors

respectively. OA = AB = R. The net magnetic field at the centre O is zero. Then the ratio of

the currents in the loop and the straight conductors is

(1) 

(2) 2

1

(3)



(4)

2

Ans: (4)

20. Two tangent galvanometers, which are identical except in their number of turns, are

connected in parallel. The ratio of their resistances of the coils is 1 : 3. If the deflections in

the two tangent galvanometers are 30o

of turns is

(1) 1 : 1 (2) 3 : 1 (3) 1 : 2 (4) 1 : 6

Ans: (None of the options matching)

1

21. A charged particle with a velocity 2  103 ms-1

magnetic fields in mutually perpendicular directions. The magnetic field is 1.5 T. The

magnitude of electric field will be

(1) 1.5  103 NC-1

Ans: (3)

22. In R-L-C series circuit, the potential differences across each element is 20 V. Now the value

of the resistance alone is doubled, then P.D. across R, L and C respectively.

(1) 20 V, 10 V, 10 V (2) 20 V, 20 V, 20 V (3) 20 V, 40 V, 40 V (4) 10 V, 20 V, 20 V

Ans: (1)

23. A rectangular coil of 100 turns and size 0.1 m  0.05 m is placed perpendicular to a magnetic

field of 0.1 T. If the field drops to 0.05 T in 0.05 second, the magnitude of the e.m.f. induced

in the coil is

(1)

Ans: (No answer)

24. In the circuit diagram, heat produces in R, 2R and 1.5 R are in the ratio of

(1) 4 : 2 : 3

(2) 8 : 4 : 27

(3) 2 : 4 : 3

(4) 27 : 8 : 4

(2) 2  103 NC-1

2

(2)

Ans: (2)

25. A series combination of resistor (R), capacitor (C) is connected to an A.C. source angular

frequency ‘’. Keeping the voltage same, if the frequency is changed to /3, the current

becomes half of the original current. Then the ratio of the capacitive reactance and resistance

at the former frequency is

(1)

Ans: (1)

26. Pick out the correct statement from the following:

(1) Mercury vapour lamp produces line emission spectrum.

(2) Oil flame produces line emission spectrum

(3) Band spectrum helps us to study molecular structure

(4) Sunlight spectrum is an example for line absorption spectrum

Ans: (1, 3, 4)

27. Light emitted during the deexcitation of electron from n = 3 to n = 2, when incident on a

metal, photoelectrons are just emitted from that metal. In which of the following

deexcitations photoelectric effect is not possible?

(1) From n = 2 to n = 1 (2) From n = 3 to n = 1

(3) From n = 5 to n = 2 (4) From n = 4 to n = 3

Ans: (4)

0.6

(2)

28. The additional energy that should be given to an electron to reduce its de-Broglie wavelength

from 1 nm to 0.5 nm is

(1) 2 times the initial kinetic energy (2) 3 times the initial kinetic energy

(3) 0.5 times the initial kinetic energy (4) 4 times the initial kinetic energy

Ans: (2)

29. The ionisation energy of an electron in the ground state of helium atom is 24.6 eV. The

energy required to remove both the electron is

(1) 51.8 eV (2) 79 eV (3) 38.2 eV (4) 49.2 eV

Ans: (2)

30. ___________________3E

___________________5E/3

___________________E

The figure shows the energy level of certain atom. When the electron deexcites from 3E to E,

an electromagnetic wave of wavelength  is emitted. What is the wavelength of the

electromagnetic wave emitted when the electron deexcites from

(1) 3 (2) 2 (3) 5 (4)

Ans: (1)

31. Maximum velocity of the photoelectron emitted by a metal is 1.8 x 106 ms-1

of specific charge of the electron is 1.8 x 1011 C kg-1

1) 1 2) 3 3) 9 4) 6

Ans: (3)

32. 1 and 2 are used to illuminate the slits. 1 and 2 are the corresponding fringe widths. The

wavelength 1 can produce photoelectric effect when incident on a metal. But the

wavelength 2 cannot produce photoelectric effect. The correct relation between 1 and 2 is

1) 1 < 2 2) 1 = 2 3) 1 > 2 4) 1  2

Ans: (1)

33. Pick out the correct statements from the following:

a) Electron emission during B-decay is always accompanied by neutrino.

b) Nuclear force is charge independent.

c) Fusion is the chief source of stellar energy.

1) (a), (b) correct 2) (a), (c) are correct 3) only (a) is correct 4) (b), (c) are correct

Ans: (4)

34. A nucleus ZX

is

1)

Ans: (2)



35. A radioactive substance emits 100 beta particles in the first 2 seconds and 50 beta particles

in the next 2 seconds. The mean life of the sample is

1) 4 seconds 2) 2 seconds 3)

Ans: (3)

A

A  4

4v

emits an -particle with velocity v. The recoil speed of the daughter nucleus

2)

36. In which of the following statements, the obtained impure semiconductor is of p-type?

1) Germanium is doped with bismuth 2) Silicon is doped with antimony

3) Germanium is doped with gallium 4) Silicon is doped with phosphorus

Ans: (3)

37. The width of the depletion region in a P-N junction diode is

1) increased by reverse bias 2) increased by forward bias

3) decreased by reverse bias 4) independent of the bias voltage

Ans: (1)

38. When the transistor is used as an amplifier

1) Emitter-base junction must be reverse biased, Collector-base junction must be forward

biased.

2) Emitter-base junction must be forward biased, Collector-base junction must be forward

biased.

3) Emitter-base junction must be reverse biased, Collector-base junction must be reverse

biased.

4) Emitter-base junction must be forward biased, Collector-base junction must be reverse

biased.

Ans: (4)

39. Which of the following is not made by quarks?

1) Neutron 2) Positron 3) Proton 4) -meson

Ans: (2)

40. Which one of the following is NOT correct?

1) In forward biased condition diode conducts.

2) If the packing fraction is negative, the element is stable.

3) Binding energy is the energy equivalent to mass defect.

4) Radioactive element can undergo spontaneous fission.

Ans: (4)

41. The output of an OR gate is connected to both the inputs of a NAND gate. The combination

will serve as

1) AND gate 2) NOT gate 3) NAND gate 4) NOR gate

Ans: (4)

42. A and B are the two radioactive elements. The mixture of these elements show a total

activity of 1200 disintergrations/minute. The half life of A is 1 day and that of B is 2 days.

What will be the total activity after 4 days? Given: The initial number of atoms in A and B

are equal.

1) 200 dis/min 2) 250 dis/min 3) 500 dis/min 4) 150 dis/min

Ans: (4)

43. The binding energy/ nucleon of deuteron (1H

7 MeV respectively. If the two deuteron atoms fuse to form a single helium atom, then the

energy released is

1) 26.9 MeV 2) 25.8 MeV 3) 23.6 MeV 4) 12.9 MeV

Ans: (3)

44. Which one of the following is NOT correct?

1) Dimensional formula of thermal conductivity (K) is M1

2) Dimensional formula of potential (V) is M1

3) Dimensional formula of permeability of free space (0) is M1

4) Dimensional formula of RC is M0

Ans: (2 & 4)

45. In a lift moving up with an acceleration of 5 ms-2

The time taken by the ball to reach the floor of the lift is ............ (nearly) (g = 10 ms-2

1) 0.3 second 2) 0.2 second 3) 0.16 second 4) 0.4 second

Ans: (4)

46. A gun fires a small bullet with kinetic energy K. Then kinetic energy of the gun while

recoiling is

a) K b) more than K c) less than K d)

Ans: (3)

47. From a fixed support, two small identical spheres are suspended by means of strings of

length 1 m each. They are pulled aside as shown and then released. B is the mean position.

Then the two spheres collide.

1) at B after 0.25 second

2) at B after 0.5 second

3) on the right side of B after some time

4) on the right side of B when the strings are inclined at 150 with B

Ans: (2)

48. A truck accelerates from speed v to 2v. Work done in during this is

1) three times as the work done in accelerating it from rest to v.

2) same as the work done in accelerating it from rest to v.

3) four times as the work den in accelerating it from rest to v.

4) less then the work done in accelerating it from rest to v.

Ans: (1)

49. Earth is moving around the Sun in elliptical orbit as shown. The ratio of OB and OA is R.

Then the ratio of Earth at A and B is

1) R-1 2)

3) R 4) R2/3

Ans: (Question incomplete)

50. A projectile is projected at 10 ms-1

time its velocity makes an angle of 300

1)

Ans: (1)

51. For which combination of working temperatures of source and sink, the efficiency of

Carnot’s heat engine is maximum?

1) 600 K, 400 K 2) 400 K, 200 K 3) 500 K, 300 K 4) 300 K, 100 K

Ans: (4)

52. A solid cylinder of radius R made of a material of thermal conductivity K1 is surrounded by a

cylindrical shell of inner radius R and outer radius 2R made of a material of thermal

conductivity K2. The two ends of the combined system are maintained at two different

temperatures. Then there is no loss of heat across the cylindrical surface and the system is

in steady state. The effective thermal conductivity of the system is

1) K1 + K2 2)

Ans: (4)

10

3

2) 10

53. Two stars A and B radiate maximum energy at the wavelengths of 360 nm and 480 nm

respectively. Then the ratio of the surface temperatures of A and B is

1) 3 : 4 2) 81 : 256 3) 4 : 3 4) 256 : 81

Ans: (3)

54. Two solids P and Q float in water. It is observed that P floats with half of its volume

immersed and Q floats with

is

1) 4/3 2) 3/4 3) 2/3 4) 3/2

Ans: (2)

55. The equation of a transverse wave is given by y = 0.05 sin  (2t – 0.02 x), where x, y are

in metre and t is in second. The minimum distance of separation between two particles

which are in phase and the wave velocity are respectively ...........

1) 50 m. 50 ms-1 2) 100 m. 100 ms-1 3) 50 m. 100 ms-1 4) 100 m. 50 ms-1

Ans: (2)

56. The frequency of the second overtone of the open pipe is equal to the frequency of the first

overtone of the closed pipe. The ratio of the lengths of the open pipe and the closed pipe is

1) 2 : 1 2) 1 : 2 3) 1 : 3 4) 3 : 1

Ans: (1)

57. A person with vibrating tuning fork of frequency 338 Hz is moving towards a vertical wall

with a speed of 2 ms-1

that person per second is

1) 2 2) 4 3) 6 4) 8

Ans: (2)

58. Pick out the WRONG statement from the following:

1) Lateral shift increases as the angle of incidence increases.

2) Lateral shift increases as the value of refractive index increases

3) Normal shift decreases as the value of refractive index increases

4) Both normal shift and lateral shift are directly proportional to the thickness of the

medium.

Ans: (2)

60. The distance between an object and its real image produced by a converging lens is 0.72

m. The magnification is 2. What will be the magnification when the object is moved by 0.04

m towards the lens?

1) 2 2) 4 3) 3 4) 6’

Ans: (2)
  #3  
4th November 2015, 12:35 PM
Unregistered
Guest
 
Re: Question Bank for KCET

Hi I would like to have the Molecular Biology question bank for KCET examination for my preparation purpose?
  #4  
4th November 2015, 12:37 PM
Super Moderator
 
Join Date: May 2012
Re: Question Bank for KCET

Here I am providing you with some of the question of Molecular Biology Question:

Molecular Biology Question Bank

1. Nucleic acids were first discovered by
a) Boysen Jensen b) Friederich Meischer c) Johansen d) Went

2. A nucleotide consists of
a) A nitrogen base and pentose sugar
b) A nitrogen base and phosphate
c) A Pentose sugar and phosphate
d) A nitrogen base, pentose sugar & phosphate

3. DNA molecule does not contain
a) Thymine b) Uracil c) Adenine d) Cytosine

4. RNA molecule does not contain
a) Uracil b) Thymine c) Cytosine d) Adenine

5. Double helical model was proposed by
a) Boysen Jensen b) Watson and Crick
c) Watson and Tatum d) Schleiden and Schwann

6. DNA molecule is usually
a) single stranded b) Double stranded
c) Single stranded or Double Stranded d) None of the above

7. Maximum diameter of DNA double helix is
a) 20A b) 34A c) 20μ d) 34mu
8. Linear length of DNA along one full turn is
a) 20A b) 2A c) 34μ d) 34A

9. Number of nucleotide pair
s in one full turn of DNA are
a) 10 b) 12 c) 9 d) 11

10. The exact length of DNA double helix is
a) 1000A b)10,000A c) 100A d) variable

11. Linear length between two pairs of nucleotides in DNA is
a) 3.8A° b) 3.4A° c) 4A° d) 2A°

12. Two polynucleotide chains of DNA are
a) Identical b) Circular c) Comp limentary d) None of the above


question Bank for Molecular Biology subject





  #5  
20th February 2016, 09:58 AM
Unregistered
Guest
 
Re: Question Bank for KCET

Hi I would like to have the Molecular Biology question bank for KCET examination for my preparation purpose?
  #6  
20th February 2016, 10:02 AM
Super Moderator
 
Join Date: Apr 2013
Re: Question Bank for KCET

Here I am providing you with some of the question of Molecular Biology Question:

Molecular Biology Question Bank

1. Nucleic acids were first discovered by
a) Boysen Jensen b) Friederich Meischer c) Johansen d) Went

2. A nucleotide consists of
a) A nitrogen base and pentose sugar
b) A nitrogen base and phosphate
c) A Pentose sugar and phosphate
d) A nitrogen base, pentose sugar & phosphate

3. DNA molecule does not contain
a) Thymine b) Uracil c) Adenine d) Cytosine

4. RNA molecule does not contain
a) Uracil b) Thymine c) Cytosine d) Adenine

5. Double helical model was proposed by
a) Boysen Jensen b) Watson and Crick
c) Watson and Tatum d) Schleiden and Schwann

6. DNA molecule is usually
a) single stranded b) Double stranded
c) Single stranded or Double Stranded d) None of the above

7. Maximum diameter of DNA double helix is
a) 20A b) 34A c) 20μ d) 34mu
8. Linear length of DNA along one full turn is
a) 20A b) 2A c) 34μ d) 34A

9. Number of nucleotide pair
s in one full turn of DNA are
a) 10 b) 12 c) 9 d) 11

10. The exact length of DNA double helix is
a) 1000A b)10,000A c) 100A d) variable

11. Linear length between two pairs of nucleotides in DNA is
a) 3.8A° b) 3.4A° c) 4A° d) 2A°

12. Two polynucleotide chains of DNA are
a) Identical b) Circular c) Comp limentary d) None of the above

Please find the entire question Bank for Molecular Biology subject attached below

question Bank for Molecular Biology subject







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