Electricity Quiz

What is the function of a resistor in an electrical circuit?

• Resistors are used to store electrical energy

• The function of a resistor in an electrical circuit is to limit the flow of current.

• Resistors are used to amplify the current in a circuit

• The function of a resistor is to increase voltage

Define the term 'voltage' in an electrical circuit.

• Voltage is the flow of electrons in a circuit.

• Voltage is the brightness of a light bulb in a circuit.

• Voltage is the difference in electric potential energy between two points in an electrical circuit.

• Voltage is the resistance in an electrical circuit.

Calculate the resistance if the voltage is 12V and the current is 3A.

• 4 ohms

• 8 ohms

• 2 ohms

• 6 ohms

In a series circuit, how does the total resistance compare to the individual resistances?

• The total resistance is less than the sum of the individual resistances.

• The total resistance is unrelated to the individual resistances.

• The total resistance is equal to the sum of the individual resistances.

• The total resistance is greater than the sum of the individual resistances.

What is the unit of measurement for current in an electrical circuit?

• Volts (V)

• Ohms (Ω)

• Watts (W)

• Amperes (A)

Explain the difference between a parallel and series circuit.

• In a parallel circuit, components are connected in a single path with the same current but different voltages.

• In a parallel circuit, components are connected in branches with the same voltage but different currents. In a series circuit, components are connected in a single path with the same current but different voltages.

• In a series circuit, components are connected in branches with the same voltage but different currents.

• In a parallel circuit, components are connected in branches with the same current but different voltages.

If a circuit has a resistance of 5 ohms and a current of 2A, what is the voltage?

• 10 volts

• 7 volts

• 15 volts

• 3 volts

What happens to the total resistance in a parallel circuit as more resistors are added?

• The total resistance in a parallel circuit becomes negative when more resistors are added.

• The total resistance in a parallel circuit remains the same regardless of the number of resistors added.

• The total resistance in a parallel circuit decreases as more resistors are added.

• The total resistance in a parallel circuit increases as more resistors are added.

How is the total current in a series circuit affected if one resistor is removed?

• The total current increases

• The total current becomes zero

• The total current in a series circuit is not affected if one resistor is removed.

• The total current decreases significantly

Calculate the current if the voltage is 9V and the resistance is 3 ohms.

• 6A

• 2A

• 3A

• 4A