Bennett Mechanical Electricity and Circuits Questions and Answers

Question 1

In the circuit diagram shown, three identical light bulbs are connected to a battery. If bulb B burns out (creating an open circuit), what will happen to bulbs A and C?

Accepted Answer

Bulb A will turn off, and bulb C will remain lit.

Answer

Both bulbs A and C will turn off.

Answer

Bulb A will get brighter, and bulb C will turn off.

Answer

Bulb A will turn off, and bulb C will get brighter.

Question 2

Which of the following best describes the primary function of a fuse in an electrical circuit?

Accepted Answer

To protect the circuit from excessive current.

Answer

To store electrical energy for later use.

Answer

To increase the voltage of the circuit.

Answer

To regulate the flow of current to a constant value.

Question 3

Two copper wires are of the same length, but one is thicker than the other. Which statement is true regarding their electrical resistance?

Accepted Answer

The thicker wire has less resistance.

Answer

The thinner wire has less resistance.

Answer

Both wires have the same resistance.

Answer

The resistance depends on the voltage applied, not the thickness.

Question 4

In a simple series circuit, if you add another resistor, what happens to the total resistance and the total current of the circuit?

Accepted Answer

Total resistance increases, and total current decreases.

Answer

Total resistance decreases, and total current increases.

Answer

Total resistance increases, and total current stays the same.

Answer

Total resistance stays the same, and total current decreases.

Question 5

A technician accidentally drops a metal wrench across the positive and negative terminals of a live car battery. This creates a dangerous situation known as a:

Accepted Answer

Short circuit

Answer

Parallel circuit

Answer

Open circuit

Answer

Series circuit

Question 6

According to Ohm's Law, if the voltage across a resistor is doubled, what happens to the current flowing through it?

Accepted Answer

The current is doubled.

Answer

The current is halved.

Answer

The current is quartered.

Answer

The current remains the same.

In the circuit diagram shown, three identical light bulbs are connected to a battery.If bulb B burns out (creating an open circuit), what will happen to bulbs A and C?

In the circuit diagram shown, three identical light bulbs are connected to a battery.
If bulb B burns out (creating an open circuit), what will happen to bulbs A and C?