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.

1,667.

The energy, E stored in an inductor of inductance L when current I passes through it is given by the equation

A.

E = \(\frac{1}{2} LI^2\)

B.

E = LI2

C.

E \(\frac{1}{2}LI\)

D.

E = \(\frac{1}{2} L^2I\)

Correct answer is B

No explanation has been provided for this answer.

1,668.

In order to prevent bar magnets from losing their strength, they are stored wih keepers such that the two bars are placed with

A.

like poles facing each other and the keepers placed between them

B.

like poles facing each other and the keepers placed between them

C.

unlike poles facing each other and the keepers placed at their ends

D.

unlike poles facing each other and the keepers placed between them

Correct answer is C

No explanation has been provided for this answer.

1,669.

Which of the following factors will increase the sensitivity of moving coil meter?

A.

strong spring

B.

low numbers of turns

C.

small area of coil

D.

soft iron core

Correct answer is D

No explanation has been provided for this answer.

1,670.

Which of the following factors does not affect the electric resistance of wire?

A.

length

B.

mass

C.

temperature

D.

cross-sectional area

Correct answer is B

No explanation has been provided for this answer.