5
lesson pretestMultiple Choice

Pretest

Question 5 • Physics

What effect will the extension cord have on the circuit? Cici uses a long extension cord to plug a lamp into a wall outlet in the next room.

Answer
A
It will decrease the resistance of the circuit.
B
It will increase the voltage of the outlet.
C
It will increase the resistance in the circuit.
D
It will decrease the voltage of the outlet.

Explanation

A long extension cord adds more wire to the path of the electric current. The wire has resistance, so adding more of it increases the circuit’s total resistance. The cord does not increase the outlet’s voltage.

AI-written and checked against the verified answer.

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