Processing math: 100%
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.

3,361.

Calculate the electric potential at a distance of 20.0cm from a point charge of 0.015C placed in air of permittivity (Take 1/4πεo as 9.0 x 109 Nm2C2)

A.

3.40x106V

B.

6.75x105V

C.

6.75x1012V

D.

3.40x105V

E.

8.30 x 102V

Correct answer is B

No explanation has been provided for this answer.

3,362.

Calculate the inductance L of the coil in the circuit shown above.

A.

14.4H

B.

3.8H

C.

0.6H

D.

0.4H

E.

0.2H

Correct answer is C

XL = VI=2402=120Ω

L = XL2πf

= 120×π2×π×100

= 0.6H

3,363.

A balloon containing 546cm3 of air is heated from 0oC to 10oC. If the pressure is kept constant, what will be its volume at 10oC?

A.

526cm3

B.

546cm3

C.

556cm

D.

566cm3

E.

819cm3

Correct answer is D

No explanation has been provided for this answer.

3,364.

A charge of 1.6 x 10-10C is placed in a uniform electric field of intensity 2.0 x 105NC-1. What is the magnitude of the electric force exerted on the charge?

A.

3.2 x105N

B.

1.8 x105N

C.

3.2 x10-5N

D.

1.8 x10-5N

E.

4.0X10-6N

Correct answer is C

No explanation has been provided for this answer.