1. Two cars, X and Y, are travelling towards a junction. The velocity of car X is VX and car Y is VY. Which of the following vectors represent the velocity of Y relative to

X?

2. The graph shows the variation of the acceleration a of an object with time t. What is the change in speed of the object shown by the graph?

3. A ball of mass m collides with a vertical wall with an initial horizontal speed u and rebounds with a horizontal speed v. The graph shows the variation of the speed of the ball with time. What is the magnitude of the mean net force on the ball during the collision?

4. Four point charges of magnitudes +q, +q, –q, and –q are held in place at the corners of a square of side r. The Coulomb constant is k. Which of the following is the electrical potential at the center of the square O?

5. The diagram shows the path of a particle in a region of uniform magnetic field. The field is directed into the plane of the page. This particle could be

6. An ion follows a circular path in a uniform magnetic field. Which single change decreases the radius of the path?

7. A current carrying wire is in the same plane as a uniform magnetic field. The angle between the wire and the magnetic field is θ. The magnetic force on the

current carrying wire is

8. The nuclear reaction represented by
is an example of

9. An ideal gas and a solid of the same substance are at the same temperature. The average kinetic energy of the gas molecules is Eg and the average kinetic energy of the solid molecules is Es. What is the comparison between Eg and Es?

10. The graph below shows the variation of the intensity of light with angle for the diffraction pattern produced when light is diffracted by a slit.

According to the Rayleigh criterion, when the diffraction patterns of two slits are just resolved