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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?


Aa lightbulb
Ba motor
Ca resistor
Da second battery

Verified Answer :

Final answer:

Elaine can add a resistor to reduce the flow of current in her circuit without changing its operation. A resistor limits current flow, protecting sensitive components. It is more effective than using a lightbulb, motor, or additional battery for this purpose.


Explanation:

Reducing Current in an Electric Circuit

In Elaine's electric circuit, she needs to lower the flow of current without disrupting the functionality of the circuit. One effective way to do this is by introducing a resistor.

A resistor is a component that limits the flow of electrical current. When placed in a circuit, it allows us to control how much current passes through. This is crucial for protecting sensitive components, like a door buzzer, from excessive current that could damage them.

Examples of Circuit Components

  • A lightbulb also has resistance but would likely not be suitable as it is a load and consumes current.
  • A motor would require a significant amount of current, thus not helpful in reducing it.
  • A second battery would increase the current instead of reducing it.

Thus, adding a resistor is the best option for Elaine to safely manage the current in her circuit.


Learn more about current control here:

https://brainly.com/question/14469992


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