Review Activity

Which of the following correctly defines electric current?

• The resistance of a conductor.

• The total number of electrons flowing in a conductor

• The force pushing electrons continuously in a conductor.

• The amount of charge passing through a point per unit time.

Which of the following describes a complete circuit?

• There is no battery connected.

• Electrons stop moving because the circuit is open.

• Electrons can move freely because the circuit is closed.

• Only one wire or one pathway is connected to the battery.

What does Ohm’s law state?

• Voltage is equal to current divided by resistance.

• Current is directly proportional to resistance and indirectly to voltage.

• Current is directly proportional to voltage and inversely proportional to resistance.

• Current is inversely proportional to voltage and directly proportional to resistance.

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

• To store electrical energy.

• To convert current into voltage.

• To control the resistance in a circuit.

• To open or close the circuit to control current flow.

What happens to the current in a circuit if the battery’s voltage is increased while resistance remains constant?

• Current decreases.

• Current increases.

• Current becomes zero.

• Current remains unchanged.

What is the unit of electric current?

• Ohms

• Amperes

• Volts

• Watts

What is the effect of increasing resistance in a circuit while keeping voltage constant?

• Current remains the same

• Current decreases

• Current increases

• Voltage decreases

What is the relationship between voltage, current, and resistance in a circuit?

• Voltage is the sum of current and resistance.

• Resistance is the sum of voltage and current.

• Current is the product of voltage and resistance.

• Voltage is the product of current and resistance.

What is the unit of electrical resistance?

• Volts

• Amperes

• Ohms

• Watts

A flashlight bulb draws 0.57A from its 12V battery. Solve for the resistance.