OAR OAR Mechanical Comprehension: Electricity Questions and Answers 3

Question 1

What is the total resistance of a 6-ohm and a 3-ohm resistor connected in parallel?

Accepted Answer

2 ohms

Answer

9 ohms

Answer

4.5 ohms

Answer

3 ohms

Question 2

Which component opposes changes in current flow in a circuit?

Accepted Answer

Inductor

Answer

Capacitor

Answer

Resistor

Answer

Diode

Question 3

If the voltage across a circuit is doubled while resistance stays the same, what happens to the current?

Accepted Answer

It doubles

Answer

It halves

Answer

It quadruples

Answer

It stays the same

Question 4

What does a fuse do in an electrical circuit?

Accepted Answer

Breaks the circuit when current exceeds a safe level

Answer

Increases voltage output

Answer

Stores excess electrical charge

Answer

Converts AC to DC

Question 5

In a DC circuit, electrons flow from which terminal to which?

Accepted Answer

Negative to positive

Answer

Positive to negative

Answer

They alternate direction

Answer

They do not move

Question 6

What is the power dissipated by a 10-ohm resistor carrying 2 amperes of current?

Accepted Answer

40 W

Answer

20 W

Answer

5 W

Answer

100 W