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.

2,411.

An example of a scalar quantity is

A.

velocity

B.

weight

C.

electric charge

D.

acceleration due to gravity

E.

momentum

Correct answer is C

No explanation has been provided for this answer.

2,412.

A cell of e.m.f 2V and internal resistance 1\(\Omega\) supplies a current of 0.5 amps to a resistance whose value is

A.

0.5\(\Omega\)

B.

1\(\Omega\)

C.

2\(\Omega\)

D.

2.5\(\Omega\)

E.

3\(\Omega\)

Correct answer is E

1 = \(\frac{E}{R + r}\)

\(\frac{2}{R + 1}\) = 0.5

0.5R = 2 - 0.5 = 1.5

R = \(\frac{1.5}{0.5}\)

= 3\(\Omega\)

2,413.

Which of the following is NOT an effect that can be produced by an electric current?

A.

heat

B.

light

C.

sound

D.

motion

E.

none of the above

Correct answer is E

No explanation has been provided for this answer.

2,415.

Heat may be transferred by conduction, convection and radiation. By which of these methods does heat travel through vacuum?

A.

conduction only

B.

convection only

C.

radiation only

D.

non of these methods

Correct answer is C

No explanation has been provided for this answer.