FREE AFCT Electronics: Circuits and Schematics Questions and Answers

Question 1

In a simple electrical circuit, what does an 'open circuit' signify?

Accepted Answer

The path for current flow is incomplete or broken.

Answer

The circuit has a direct path to ground.

Answer

The voltage and current are at their maximum.

Answer

The circuit has zero resistance.

Question 2

According to Ohm's Law, if the voltage in a circuit is doubled while the resistance remains constant, what happens to the current?

Accepted Answer

It is doubled.

Answer

It is halved.

Answer

It remains the same.

Answer

It becomes zero.

Question 3

What is the total resistance (RT) of a circuit with three resistors (R1=10Ω, R2=20Ω, R3=30Ω) connected in series?

Accepted Answer

60Ω

Answer

10Ω

Answer

5.45Ω

Answer

30Ω

Question 4

In a schematic diagram, what does a circle with a sine wave (~) inside it represent?

Accepted Answer

An AC voltage source

Answer

A DC voltage source

Answer

A fuse

Answer

A ground connection

Question 5

In a parallel circuit, the total resistance is always...

Accepted Answer

less than the smallest individual resistance.

Answer

the sum of all individual resistances.

Answer

equal to the largest individual resistance.

Answer

the average of all individual resistances.

Question 6

What is the primary purpose of a fuse in an electrical circuit?

Accepted Answer

To protect the circuit from overcurrent

Answer

To store electrical charge

Answer

To increase the voltage

Answer

To regulate the flow of current