NSAA NSAA Physics - Electricity and Magnetism 2

Question 1

A 10 Ω resistor carries 2 A of current. What power is dissipated?

Accepted Answer

40 W

Answer

5 W

Answer

20 W

Answer

100 W

Question 2

A capacitor stores 0.01 C of charge at a potential difference of 5 V. What is its capacitance?

Accepted Answer

0.002 F

Answer

0.005 F

Answer

0.02 F

Answer

0.05 F

Question 3

Which of the following best describes the direction of conventional current in a circuit?

Accepted Answer

From positive to negative terminal

Answer

From negative to positive terminal

Answer

In both directions simultaneously

Answer

From the lowest potential to highest potential

Question 4

A solenoid with 200 turns carries a current. Doubling the number of turns while keeping current constant will have what effect on the magnetic field inside?

Accepted Answer

Double it

Answer

Halve it

Answer

Keep it the same

Answer

Quadruple it

Question 5

A wire of length 0.5 m carrying 4 A is placed perpendicular to a magnetic field of 0.3 T. What force acts on it?

Accepted Answer

0.6 N

Answer

0.3 N

Answer

1.2 N

Answer

2.4 N

Question 6

Which law states that the induced EMF in a circuit is proportional to the rate of change of magnetic flux?

Accepted Answer

Faraday's Law

Answer

Ampere's Law

Answer

Coulomb's Law

Answer

Lenz's Law