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.

3,487.

The image of a pin formed by a diverging lens of focal length 10cm is 5cm from the lens. Calculate the distance of the pin from the lens

A.

-3.3cm

B.

3.3cm

C.

10.0cm

D.

15.0cm

E.

20.0cm

Correct answer is B

1/u - 1/v = 1/f; f = 10cm, v = 5cm
u = 10/3 = 3.3cm

3,488.

In an experiment to measure1 the focal length f of a converging lens object distances u and corresponding image distance were measured and 1/u plotted against 1/v to obtain the graph illustrated. How would f be determined from this graph?

A.

f= the slope of the graph

B.

f= the intercept on the 1/u axis

C.

f =the intercept on the 1/v axis

D.

f = reciprocal of the slope

E.

f = reciprocal of the intercept on either axes

Correct answer is E

No explanation has been provided for this answer.

3,489.

Which of the following statements is not correct for a light ray passing through a rectangular glass block which is surrounded by air? It

A.

suffers a displacement at the point of emergence

B.

emerges parallel to the incident ray

C.

is partly reflected at the point of incidence

D.

is deviated at the point of emergence

E.

is reflected in the block

Correct answer is A

No explanation has been provided for this answer.

3,490.

Images formed by a convex mirror are always

A.

inverted, real and diminished

B.

inverted, virtual and diminished

C.

erect, virtual and diminished

D.

erect, real and magnified

E.

erect, virtual and magnified

Correct answer is C

No explanation has been provided for this answer.