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.

296.

In photoelectric effect, the number of electrode emitted per second from a metallic surface is proportional to the

A.

intensity of the incident radiation

B.

frequency of the incident radiation

C.

energy of the incident radiation

D.

work function of the metal.

Correct answer is A

No explanation has been provided for this answer.

297.

The vacuum between the double walls of a thermos flask reduces heat loss through

A.

conduction and radiation

B.

convection and conduction

C.

radiation only

D.

conduction only

Correct answer is B

No explanation has been provided for this answer.

298.

Which of the following units is not fundamental?

A.

Metre

B.

Kilogram

C.

Joule

D.

Candela

Correct answer is C

No explanation has been provided for this answer.

299.

A luminous object is one that

A.

gives off dim blue-green light only in the dark.

B.

gives out light of its own

C.

shines by reflected light only

D.

glows only in the presence of light

Correct answer is B

No explanation has been provided for this answer.

300.

Which of the following actions would increase the electric force between two positively charged particles?
 

A.

Decreasing the mass of the particles

B.

Decreasing the distance between the particles

C.

Increasing the assistance between the particles

D.

Increasing the mass of the particles

Correct answer is B

No explanation has been provided for this answer.