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.

236.

The diagram illustrates the velocity-time graph of a body. Calculate the distance covered by the body during the motion

A.

15m

B.

84m

C.

72m

D.

48m

Correct answer is C

Distance covered = Area under the graph
D = area of square + area of trapezium
D = L x L + 1/2(a+b)h
D = 4 x 4 + 1/2( 4+ 10)8
D = 16 + 1/2 x 14 x 8
D = 16 + 56
D = 72m.
 

237.

The inductive reactance in a circuit of frequency 100Hz is 1ohms. Calculate the inductance of the inductor[π = 3.14]

 

A.

2.00 x 10\(_{-3}\)H

B.

1.59 x 10\(_{-3}\)H

C.

1.09 x 10\(_{-3}\)H

D.

6.28x 10\(_{-3}\)H

Correct answer is B

No explanation has been provided for this answer.

239.

A student wishes to measure the potential difference across a resistor,R. She has a galvanometer,G and some connecting wires.

What else does she need?

A.

high value resistor connected in parallel with G

B.

low value resistor connected in parallel with G low value

C.

resistor connected in series with G

D.

high value resistor connected in series with G.

Correct answer is D

No explanation has been provided for this answer.

240.

The acceleration of a moving object can be determined from the? 

A.

slope of its distance-time graph

B.

area under its distance-time graph

C.

slope of its velocity-time graph

D.

area under its velocity-time graph

Correct answer is C

No explanation has been provided for this answer.