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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.

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1,881.

Two capacitors of capacitance 0.4 $\mu F$ and 0.5 $\mu F$ are connected in parallel and charged to a p.d. of 50V, Determine the total charge acquired

45 $\mu C$

25 $\mu C$

20 $\mu C$

10 $\mu C$

View answer & explanation

Correct answer is A

C = $C_1 + C_2$ = 0.4 + 0.5 = 0.9 $\mu F$

Q = Cv = 0.9 x 50 = 45 $\mu C$

1,882.

The ability of a material to store an electric charge when its plates are at different potentials is referred to as its

conductance

inductance

capacitance

resistance

View answer & explanation

Correct answer is C

No explanation has been provided for this answer.

1,883.

In which of the following media is the transmission of sound wave fastest?

Vacuum

Air

Wood

Iron

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

1,884.

A ray of light is incident normally on a plane mirror. If the incident ray is kept fixed while the mirror is rotated through an angle of 30°, determine the initial and final angles of reflection respectively

0^o and 60^o

90^o and 30^o

0^o and 30^o

90^o and 60^o

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

1,885.

Which of the following optical instruments does not depend on the use of plane mirrors?

kaleidoscope

simple microscope

sextant

simple periscope

View answer & explanation

Correct answer is B

No explanation has been provided for this answer.

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