## Wednesday, April 30, 2008

### IIT JEE Physics Model Questions 30th April

1. Identify the set which has one quantity derived from fundamental quantities involved in other quantities

a. length, velocity and mass
b. length, acceleration, and time
c. mass, time and acceleration
d. length, mass and time

2. Which of the following magnitudes represent the vectors that add to zero.

a. 2,4,8
b. 4,8,16
c. 1,2,1
d. 0.5,1,2

3. A large stone is thrown from a tower of height h with a speed of v. The stone will hit the ground with maximum speed if it is thrown

a. vertically downward
b. vertically upward
c. horizontally
d. the speed does not depend on the initial direction

4. Identify the correct statements

a. Speed is magnitude of velocity.
b. Average speed is magnitude of average velocity
c. Velocity is distance covered divided by time taken.
d. Instantaneous velocity is square root of average velocity.

5. Identify the correct statements

a. A frame of reference in which Newton’s first law is valid is called an inertial frame of reference.
b. A particle remains unaccelerated only when the vector sum of all forces acting on the particle is zero.
c. All frames moving with a constant acceleration with respect to an inertial frame are themselves inertial.
d. Inertia is a property of particles that determines the acceleration of different particle subject to the same force.

6. A body is moving on curved path. Which of the quantities given below may remain constant during the motion of the body?
a. velocity
b. speed
c. magnitude of acceleration
d. acceleration

7. Statement 1
A proton exerts attractive force on protons in the nucleus.

Statement 2

For separations less than 10-15 m, nuclear forces of attraction between particles of a nucleus are stronger than coulomb repulsion force.

a. Statement 1 is false, statement 2 is true.
b. Both statements are true, statement 2 is not a correct reason for 1.
c. Both statements are false.
d. Both statements are true, statement 2 is a correct explanation of statement 1.

8. Statement 1
The magnitude of the kinetic fiction is proportional to normal force acting between the two bodies.

Statement 2
The parallel component of contact force between two components is called friction.

a. Statement 1 is true, but statement 2 is false.
b. Statement 1 is false, but statement 2 is true.
c. Both statements are true.
d. Both statements are false.

9. Statement 1.
The equation of a wave traveling in the positive x direction with a constant speed is y = f(t-x/v)

Statement 2
The function f can be a function a function representing simple harmonic motion.

e. Statement 1 is true, but statement 2 is false.
f. Statement 1 is false, but statement 2 is true.
g. Both statements are true.
h. Both statements are false.