Electric Circuits

Front

What is resistance in an electrical circuit?

Back

Resistance is the measure of how difficult it is for current to flow through a conductor.

Front

Define an electrical circuit.

Back

An electrical circuit is a complete, unbroken path through which electric charges can flow.

Front

What happens when a switch in a circuit is open?

Back

When a switch is open, the circuit is broken, and electric charges cannot flow.

Front

What is a series circuit?

Back

A series circuit is a type of electrical circuit in which components are connected end-to-end, so that the current flows through each component in turn.

Front

What is a parallel circuit?

Back

A parallel circuit is a type of electrical circuit in which components are connected across common points or junctions, allowing multiple paths for current to flow.

Front

What is Ohm's Law?

Back

Ohm's Law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) of the conductor, expressed as V = IR.

Front

What is the unit of resistance?

Back

The unit of resistance is the ohm (Ω).

Front

What is the role of a fuse in an electrical circuit?

Back

A fuse is a safety device that protects an electrical circuit by breaking the circuit if the current exceeds a certain level, preventing overheating and potential fires.

Front

What is the difference between direct current (DC) and alternating current (AC)?

Back

Direct current (DC) flows in one direction, while alternating current (AC) changes direction periodically.

Front

What is a short circuit?

Back

A short circuit occurs when there is a low-resistance connection between two points in a circuit, allowing excessive current to flow, which can cause damage.