KCET Key Answers

Will you please give here sample question paper of KVCET examination . Please give paper with answer key ?

[Shaleen]

As you want I am here providing you sample question paper of KCET examination with answer key.

KCET exam paper contain questions from :
Physics
Chemistry
Mathematics

KCET exam paper with answer

Sir I am looking for the Physics answer key for the KCET so can you please provide me the same

[Kiran Chandar]

Hey KCET 2016 will be held in the month of May 2016. You will have to wait patiently to know rank and score till the result is announced by KEA.


Physics answer key for the KCET 2015

1. In a Young’s double slit experiment the slit separation

is 0.5 m from the slits. For a monochromatic light of

wavelength 500 nm, the distance of 3rd maxima from

nd minima on the other side is

2

(1) 2.5 mm (2) 2.25mm

(3) 2.75mm (4) 22.5 mm

Ans: (Bonus)

Note: Data Insufficient

2. Calculate the focal length of a reading glass of a

person if his distance of distinct vision is 75 cm.

(1) 37.5 cm (2) 100.4 cm

(3) 25.6 cm (4) 75.2 cm

Ans: (1)

3. A person wants a real image of his own, 3 times

enlarged. Where should he stand infront of a concave

mirror of radius of curvature 30 cm?

(1) 30 cm (2) 20 cm

(3) 10 cm (4) 90 cm

Ans: (2)

$//(1

6. An D -particle of energy 5 MeV is scattered through

180 by gold nucleus. The distance of closest

o

approach is of the order of

(1) 12 10 cm

(3) 10 10 cm

Ans: (1)

7. Find the de-Broglie wavelength of an electron with

kinetic energy of 120 eV.

(1) 102 pm (2) 124 pm

(3) 95 pm (4) 112 pm

Ans: (4)

8. Light of two different frequencies whose photons have

energies 1 eV and 2.5 eV respectively, successively

illuminate a metallic surface whose work function is

0.5 eV. Ratio of maximum speeds of emitted electrons

will be

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

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

(2) 16 10 cm

(4) 14 10 cm



9. The polarizing angle of glass is 57°. A ray of light

which is incident at this angle will have an angle of

refraction as

(1) 33° (2) 38°

(3) 25° (4) 43°

Ans: (1)

10. To observe diffraction, the size of the obstacle

(1) should be O / 2 , Wehre O is the wavelength.

(2) should be of the order of wavelength.

(3) has no relation to wavelength.

(4) should be much larger than the wavelength.

Ans: (2)

11. A radioactive decay can form an isotope of the original

nucleus with the emission of particles

(1) one D and two E (2) four D and onceE

(3) one D and four E (4) one D and one E

Ans: (1)

12. The half life of a radioactive substance is 20 minutes.

The time taken between 50% decay and 87.5% decay

of the substance will be

(1) 40 minutes (2) 10 minutes

(3) 30 minutes (4) 25 minutes

Ans: (1)

13. A nucleus at rest splits into two nuclear parts having

radii in the ratio 1 : 2 Their velocities are in the ratio

(1) 6 : 1 (2) 2 : 1

(3) 8 : 1 (4) 4 : 1

Ans: (3)

14. What is the wavelength of light for the least energetic

photon emitted in the Lyman series of the hydrogen

spectrum. (take hc = 1240 eV nm)

(1) 102 nm (2) 150 nm

(3) 82 nm (4) 122 nm

Ans: (4)

15. If an electron in hydrogen atom jumps from an orbit

of level n = 3 to an orbit of level n = 2, the emitted

radiation has a frequency (R = Rydberg constant,

C = velocity of light)

(1) RC

25

(3) 3RC

$//(1

(2) 5RC

36

(4) 8RC

11. A radioactive decay can form an isotope of the original

nucleus with the emission of particles

(1) one D and two E (2) four D and onceE

(3) one D and four E (4) one D and one E

Ans: (1)