Bennett Mechanical Test Electricity and Circuits 5

Question 1

What is the total current drawn from the source in a parallel circuit?

Accepted Answer

The sum of the branch currents

Answer

The smallest branch current

Answer

The same as one branch

Answer

Always zero

Question 2

What is the resistance of a circuit that draws 4 amps from a 12-volt battery?

Accepted Answer

3 ohms

Answer

48 ohms

Answer

8 ohms

Answer

0.33 ohms

Question 3

Which of these is an insulator?

Accepted Answer

Rubber

Answer

Aluminum

Answer

Silver

Answer

Iron

Question 4

What component increases or decreases AC voltage in a circuit?

Accepted Answer

Transformer

Answer

Resistor

Answer

Capacitor

Answer

Fuse

Question 5

If a 60-watt bulb and a 100-watt bulb run at the same voltage, which draws more current?

Accepted Answer

The 100-watt bulb

Answer

The 60-watt bulb

Answer

Both draw equal current

Answer

Neither draws current

Question 6

What is a short circuit?

Accepted Answer

A low-resistance path that allows excessive current

Answer

A circuit with very high resistance

Answer

A circuit with no power source

Answer

A properly working circuit

Question 7

What is the function of a ground wire in an electrical system?

Accepted Answer

To provide a safe path for fault current to the earth

Answer

To increase voltage

Answer

To store charge

Answer

To reduce power consumption