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.

1,776.

The distance between a concave mirror and an object placed in front of it is 1.0m. If the raduis of curvature of the mirror is 4.0m, the image formed will be

A.

2.00m behind the mirror

B.

2.00m in front of the mirror

C.

1.25m in front of the mirror

D.

1.25m behind the mirror

Correct answer is A

\(\frac{1}{v} = \frac{1}{f} - \frac{1}{u}\)

\(\frac{1}{2} - \frac{1}{1} = \frac{1 - 2}{2} = -2\)

1,777.

In the day time, it is possible to see under shady areas such as under a tree because light has undergone

A.

internal reflection

B.

refraction

C.

diffraction

D.

diffuse reflection

Correct answer is D

No explanation has been provided for this answer.

1,778.

Light is considered as a transverse wave because it travels

A.

through material without causing disturbance of the medium

B.

through space with constant speed

C.

in a direction parallel to the plane containing the electric and magnetic fields

D.

in a direction perpendicular to the plane containing the electric and magnetic fields

Correct answer is D

No explanation has been provided for this answer.

1,779.

It takes a shorter time for a liquid to boil at the top of a mountain than at the base because at the top, the

A.

temperature is higher

B.

pressure is lower

C.

humidity is higher

D.

temperature is constant

Correct answer is B

No explanation has been provided for this answer.

1,780.

The working principle of a pressure cooker is based on the

A.

increase in the volume of steam inside it

B.

complete trapping of heat inside it

C.

increase in the pressure of the pot

D.

decrease in the pressure of the pot

Correct answer is C

No explanation has been provided for this answer.