IIT-JEE Physics previous year paper

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An AC voltage source of variable angular frequency ω and fixed amplitude V0 is connected in series with a
capacitance C and an electric bulb of resistance R (inductance zero). When ω is increased
A) the bulb glows dimmer B) the bulb glows brighter
C) total impedance of the circuit is unchanged D) total impedance of the circuit increases

A real gas behaves like an ideal gas if its
A) pressure and temperature are both high
B) pressure and temperature are both low
C) pressure is high and temperature is low
D) pressure is low and temperature is high

A point mass of 1 kg collides elastically with a stationary point mass of 5 kg. After their collision, the 1 kg
mass reverses its direction and moves with a speed of 2 ms−1. Which of the following statement(s) is (are)
correct for the system of these two masses?
A) Total momentum of the system is 3 kg ms−1
B) Momentum of 5 kg mass after collision is 4 kg ms−1
C) Kinetic energy of the centre of mass is 0.75 J
D) Total kinetic energy of the system is 4J

A student uses a simple pendulum of exactly 1m length to determine g, the acceleration due to gravity. He
uses a stop watch with the least count of 1 sec for this and records 40 seconds for 20 oscillations. For this
observation, which of the following statement(s) is (are) true?
A) Error ∆T in measuring T, the time period, is 0.05 seconds
B) Error ∆T in measuring T, the time period, is 1 second
C) Percentage error in the determination of g is 5%
D) Percentage error in the determination of g is 2.5%

A superconductor has TC (0) = 100 K. When a magnetic field of 7.5 Tesla is applied, its Tc decreases to
75 K. For this material one can definitely say that when
A) B = 5 Tesla, Tc (B) = 80 K B) B = 5 Tesla, 75 K < Tc (B) < 100 K
C) B = 10 Tesla, 75K < Tc < 100 K D) B = 10 Tesla, Tc = 70K
IIT JEE Physics model paper




For detailed paper here is attachment......................