OAR OAR Mechanical Comprehension: Electricity 5

Question 1

A wire carries 2A of current. How many coulombs of charge pass through in 30 seconds?

Accepted Answer

60C

Answer

15C

Answer

32C

Answer

0.07C

Question 2

What does increasing the cross-sectional area of a conductor do to its resistance?

Accepted Answer

Decreases resistance

Answer

Increases resistance

Answer

Has no effect

Answer

Makes resistance nonlinear

Question 3

A diode allows current to flow in which direction?

Accepted Answer

Only from anode to cathode

Answer

In both directions equally

Answer

Only from cathode to anode

Answer

Only when AC is applied

Question 4

What is the power factor in a purely resistive AC circuit?

Accepted Answer

1

Answer

0

Answer

0.5

Answer

0.707

Question 5

Which law states that the total current entering a junction equals the total current leaving it?

Accepted Answer

Kirchhoff's Current Law

Answer

Ohm's Law

Answer

Faraday's Law

Answer

Lenz's Law

Question 6

A step-up transformer increases voltage. What happens to the current on the secondary side (assuming ideal transformer)?

Accepted Answer

Current decreases proportionally

Answer

Current increases proportionally

Answer

Current stays the same

Answer

Current becomes zero

Question 7

What is the equivalent capacitance of two 4μF capacitors connected in series?

Accepted Answer

2μF

Answer

8μF

Answer

4μF

Answer

1μF