IIT-JEE-2007-Physics-Paper2

PAPER - II

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12.    STATEMENT-1

        A vertical iron rod has a coil of wire wound over it at the bottom end. An alternating current flows in the coil. The rod goes through a conducting ring as shown in the figure. The ring can float at a certain height above the coil.

                              

        Because

        STATEMENT-2

        In the above situation, a current is induced in the ring which interacts with the horizontal component of the magnetic field to produce an average force in the upward direction.

(A)    Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for statement-1.

(B)    Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for statement-1.

(C)    Statement-1 is True, Statement-2 is False

(D)    Statement-1 is False, Statement-2 is True

13.    STATEMENT-1

The total translational kinetic energy of all the molecules of a given mass of an ideal gas is 1.5 times the product of its pressure and its volume.

Because

STATEMENT-2

The molecules of a gas collide with each other and the velocities of the molecules change due to the collision

(A)    Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for statement-1.

(B)    Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for statement-1.

(C)    Statement-1 is True, Statement-2 is False

(D)    Statement-1 is False, Statement-2 is True

14.    The speed of sound of the whistle is

        (A)    340 m/s for passengers in A and 310 m/s for passengers in B

        (B)    360 m/s for passengers in A and 310 m/s for passengers in B

        (C)    310 m/s for passengers in A and 360 m/s for passengers in B

(D)    340 m/s for passengers in both the trains

15.    The distribution of the sound intensity of the whistle as observed by the passengers in train A is best represented by

    

16.    The spread of frequency as observed by the passengers in train B in

        (A)    310 Hz

        (B)    330 Hz

        (C)    350 Hz

        (D)    290 Hz

17.    Light travels as a

        (A)    parallel beam in each medium

        (B)    convergent beam in each medium

        (C)    divergent beam in each medium

        (D)    divergent beam in one medium and convergent beam in other medium

18.    The phases of the light wave at c, d, e and f are Φ_c, Φ_d, Φ_e and Φ_frespectively. It is given that Φ_c ≠ Φ_f.

        (A)    Φ_c cannot be equal to Φ_d

        (B)    Φ_d can be equal to Φ_e

        (C)    (Φ_d - Φ_f) is equal to (Φ_c - Φ_e)

        (D)    (Φ_d - Φ_c) is not equal to (Φ_f - Φ_e)

 

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