Physics questions and answers

Physics Questions and Answers

If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.

301.

A diver steps off a diving platform that is 10m above the water. If there is no air resistance during the fall, there will be a decrease in the diver's

A.

gravitational potential energy

B.

total mechanical energy

C.

kinetic energy

D.

momentum

Correct answer is A

No explanation has been provided for this answer.

303.

An electron of mass 9.1x 10\(^{31}\) kg is travelling at a speed of 2.0 x 10\(^6\)ms\(^{-1}\). Calculate the associate wavelength of the electron. [h = 6.6. x 10\(^{34}\) Js]

A.

3.63 x10\(^{10}\) m

B.

3.63 x 10\(^{-8}\) m

C.

3.63 x 10\(^{-7}\) m

D.

6.89 x 10\(^{-4}\) m

Correct answer is A

No explanation has been provided for this answer.

304.

A ray of light travels obliquely from a less dense medium to a denser medium. Which of the following statements is true about the light?
 

A.

The wavelength of the light increases in the second medium

B.

The speed of the light increases in the second medium

C.

The light refracts towards the normal

D.

There Is a change in the frequency of the light

Correct answer is C

No explanation has been provided for this answer.

305.

An a.c. generator can be converted to a d.c. electric motor by replacing the

A.

slip rings with a split ring and connecting a battery

B.

split ring with slip rings and connecting a battery

C.

a.c. with d.c. source and connecting slip rings

D.

a.c. with d.c. source and connecting split rings

Correct answer is A

No explanation has been provided for this answer.