Question

select the correct answer. elaine drew an electric circuit diagram that includes a door buzzer. but the current in the circuit is too high based on the parts she chose. which part can elaine add to lower the flow of current without changing the operation of the circuit? a. a lightbulb b. a motor c. a resistor d. a second battery

Explanation:

According to Ohm's law ($I = \frac{V}{R}$), to lower the current ($I$) in a circuit without changing the power - source (voltage $V$) and the operation of the circuit, we need to increase the resistance ($R$). A resistor is a component that provides resistance in a circuit. Adding a motor, light - bulb, or second battery will not directly lower the current in the way required.

Answer:

C. a resistor