OAR OAR Mechanical Comprehension: Electricity 2

Question 1

Two resistors of 6Ω and 12Ω are connected in parallel. What is the equivalent resistance?

Accepted Answer

4Ω

Answer

18Ω

Answer

9Ω

Answer

2Ω

Question 2

A 100W light bulb operates on a 120V circuit. What current does it draw?

Accepted Answer

0.83A

Answer

0.48A

Answer

1.2A

Answer

12A

Question 3

What happens to the total resistance when additional resistors are added in series?

Accepted Answer

It increases

Answer

It decreases

Answer

It stays the same

Answer

It becomes zero

Question 4

Which material is the best electrical conductor?

Accepted Answer

Silver

Answer

Glass

Answer

Rubber

Answer

Silicon

Question 5

A circuit has a 9V battery and a single 3Ω resistor. What power is dissipated?

Accepted Answer

27W

Answer

3W

Answer

6W

Answer

81W

Question 6

What does a capacitor do in a DC circuit once fully charged?

Accepted Answer

Blocks current flow

Answer

Allows full current to flow

Answer

Increases current

Answer

Acts as a resistor

Question 7

If voltage doubles while resistance stays constant, what happens to power?

Accepted Answer

Power quadruples

Answer

Power doubles

Answer

Power halves

Answer

Power stays the same