Circuits Review

Front

What is a complete circuit?

Back

A complete circuit is a closed loop that allows electric current to flow from a power source, through a load (like a light bulb), and back to the power source.

Front

What happens when a circuit is incomplete?

Back

When a circuit is incomplete, electric current cannot flow, and devices connected to the circuit (like light bulbs or radios) will not operate.

Front

What is the role of a switch in a circuit?

Back

A switch is a device that can open or close a circuit, controlling the flow of electricity and allowing devices to be turned on or off.

Front

How does adding more bulbs in series affect the circuit?

Back

Adding more bulbs in series increases the total resistance of the circuit, which can reduce the brightness of each bulb and may cause some bulbs to not light up.

Front

What is the difference between series and parallel circuits?

Back

In a series circuit, components are connected end-to-end, so the same current flows through all components. In a parallel circuit, components are connected across the same voltage source, allowing current to flow through multiple paths.

Front

What is the function of a resistor in a circuit?

Back

A resistor is a component that limits the flow of electric current, helping to control the voltage and current in a circuit.

Front

What is the effect of 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 overheating and damage.

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 purpose of a fuse in a circuit?

Back

A fuse is a safety device that protects a circuit by breaking the connection if the current exceeds a certain level, preventing damage to the circuit components.

Front

What is the significance of voltage in a circuit?

Back

Voltage is the electrical potential difference that drives current through a circuit. It is the force that pushes electrons through the circuit.