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.

3,041.

A particle carrying a charge of 1. 0 x 10-8C enters a magnetic field at 3.0x 10-2 ms -1 at right angles to the field. If the force on this particle is 1.8 x 10-8N, what is the magnitude of the field?

A.

6.0x10-1T

B.

6.0x10T

C.

6.0x10-3T

D.

6.0x10-4T

Correct answer is B

B = \(\frac{F}{QV}\)

B = \(\frac{1.8 \times 10^{-8}}{1.0 \times 10^{-8} \times 3.0 \times 10^{-2}}\)

3,042.

The fuse in an electric device is always connected to the

A.

neutral side of an electric supply

B.

earth side of an electric supply

C.

live side of an electric supply

D.

terminal side of an electric supply

Correct answer is C

No explanation has been provided for this answer.

3,043.

A newly charged 12V accumulator can easily start a car whereas eight new dry cells in series with a effective e.m.f. of 12V cannot start the same car because

A.

The current capacity is high

B.

The current capacity is low

C.

it cannot be re-charged

D.

it cannot easily be connected to a car

Correct answer is B

No explanation has been provided for this answer.

3,044.

Disperson of white light is the ability of white light to

A.

penetrate air, water and glass

B.

move in a straight line

C.

move around corners

D.

separate to its component colours

Correct answer is D

No explanation has been provided for this answer.

3,045.

The use of lenses is Not applicable in the

A.

projector

B.

human eye

C.

periscope

D.

telescope

Correct answer is C

No explanation has been provided for this answer.