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.

1,771.

A sound wave is produced fron a source ans an echo is heard t seconds afterwards. If d is the distance of the reflecting surface from the source, v the speed, p the wavelength and T the period of the wave, then

A.

d = \(\frac{2t}{\lambda}\)

B.

d = \(\frac{\lambda t}{2T}\)

C.

d = \(\frac{2T}{\lambda t}\)

D.

d = \(\frac{\lambda T}{2t}\)

Correct answer is B

V = \(\frac{2d}{t}\)

f\(\lambda = \frac{2d}{t} = \frac{\lambda}{T} = \frac{2d}{t}\)

1,772.

Which of the following defects of vision is as a result of the eye ball being too long?

A.

long sight

B.

astigmatism

C.

short sight

D.

loss of accommodation

Correct answer is C

No explanation has been provided for this answer.

1,774.

When viewed straight down, a fish in a pond is

A.

father below than it appears to be

B.

mearer than it appears to be

C.

found at exactly the same point it is seen

D.

seen beside its image

Correct answer is B

No explanation has been provided for this answer.

1,775.

The image of an object formed by a convex mirror is

A.

real, errect and enlarged

B.

real, inverted and enlarged

C.

virtual, erect and diminished

D.

virtual, erect and enlarge

Correct answer is C

No explanation has been provided for this answer.