7
practice testMultiple Choice

Practice Test

Question 7 • *KCPS Physics First (2027)

Liang is working with an electrical circuit. She replaces a straight electrical wire with a coiled wire. What is Liang most likely trying to do?

Answer
A
decrease the strength of the magnetic field when current flows through the circuit
B
increase the current that flows through the wire when the circuit is active
C
decrease the current that flows through the wire when the circuit is active
D
increase the strength of the magnetic field when current flows through the circuit

Explanation

A current-carrying wire produces a magnetic field, and coiling the wire makes the fields from its loops reinforce one another. This makes the magnetic field stronger than around a straight wire carrying the same current. So Liang is most likely trying to increase the magnetic field’s strength (choice C).

AI-written and checked against the verified answer.

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