Circuits

What happens to the current in a circuit when a switch is open?

• The current continues to flow.

• The current stops flowing.

• The current increases significantly.

• The current decreases slightly.

What is the purpose of a battery in an electric circuit?

• To store electrical energy for later use.

• To serve as the energy source for the circuit.

• To regulate the flow of current in the circuit.

• To convert electrical energy into mechanical energy.

What is the difference between a series circuit and a parallel circuit?

• In a series circuit, components are connected end-to-end, while in a parallel circuit, components are connected across common points.

• In a series circuit, components are connected across common points, while in a parallel circuit, components are connected end-to-end.

• In a series circuit, all components share the same voltage, while in a parallel circuit, each component has its own voltage.

• In a series circuit, the total resistance is the sum of individual resistances, while in a parallel circuit, the total resistance is less than the smallest individual resistance.

What component of a circuit can stop the current if it is open?

• A switch.

• A resistor.

• A capacitor.

• An inductor.

Why is a light bulb not lit in a circuit where the filament is broken?

• The circuit is not a complete loop, preventing current flow.

• The light bulb is faulty and needs replacement.

• The power source is turned off, stopping current flow.

• The filament is too thin to conduct electricity.

What is resistance in an electrical circuit?

• Resistance is a measure of the opposition to the flow of electric current.

• Resistance is the ability of a material to conduct electricity without any opposition.

• Resistance is the total amount of electric current flowing through a circuit.

• Resistance is the measure of voltage in an electrical circuit.

In a closed circuit, what is the function of the battery?

• The battery acts as the power source.

• The battery stores electrical energy for later use.

• The battery regulates the current flow in the circuit.

• The battery converts electrical energy into mechanical energy.

What is the function of wires in an electric circuit?

• Wires insulate the circuit components.

• Wires conduct electricity between components of the circuit.

• Wires store electrical energy for later use.

• Wires protect the circuit from short circuits.

What does it mean for a circuit to be 'closed'?

• A closed circuit means there is a complete path for current to flow.

• A closed circuit means there is no current flowing through it.

• A closed circuit means the circuit is open and incomplete.

• A closed circuit means the circuit is shorted.

What is the effect of adding more light bulbs in series to a circuit?

• It decreases the total resistance, increasing the brightness of each bulb.

• It increases the total resistance, which can decrease the brightness of each bulb.

• It has no effect on the total resistance or brightness of the bulbs.

• It causes the bulbs to flicker and eventually burn out.