GEAS CHAPTER 2 3

It takes much longer to cook food in the hills than in the plains, because

Two particles have unequal charges; one si +g and the other si 2-q. The strength of the electrostatic force between these two stationary particles si equal to F. What happens to F if the distance between the particles si halved?

• It decreases by a factor of .4

• It decreases by a factor of 2.

• it remains the same.

• It increases by a factor of .4

A Nonconducting sphere is given a nonzero net electric charge, +Q, and then brought close to a neutral conducting sphere of the same radius. Which of the following will be true?

• An electric field will be induced within the conducting sphere.

• The conducting sphere will develop a net electric charge of Q.

• The spheres will experience an electrostatic attraction.

• The spheres will experience no electrostatic interaction.

• The spheres will experience an electrostatic repulsion.

At what point between a pair of charged parallel plates will the electric field be strongest?

• it is strongest between the plates.

• it is strongest near the positive plate.

• It is strongest near the negative plate.

• The field is constant between the plates.

When the north poles of two bar magnets are brought close together,

• no force

• a downward force

• a force of attraction

• a force of repulsion

Which phenomenon is NOT experienced by sound waves?

• Reflection

• Refraction

• Polarization

• Diffraction

A photon of light from which of the following electromagnetic radiations carries the greater amount of energy?

• Blue

• Green

• Orange

• Red

A light ray is moving parallel to the principal axis of aconcave mirror, which it strikes. How will the light ray be reflected?

• Back upon itself

• Through the focal point

• Through the radius of curvature

• Through a point equal to 0.5f

The time it takes a satellite or make one orbit around the earth depends on the satellite's

• acceleration.

• weight.

• direction of rotation.

• distance from earth.

Einstein's theory of relativity is based on which of the following statements?

• Mass and energy are equivalent.

• The velocity of light is a constant.

• Space and time are anomalies.

• All particles have antiparticles.