Physics · Magnetic Effects of Electric Current
A student observes that a compass needle deflects when brought near a current-carrying wire. Using your understanding of magnetic fields, explain why this happens.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The wire causes a gravitational effect moving the needle.
- 2The wire produces an electric force that acts on the compass needle.
- 3The wire heats up, causing air currents to move the needle.
- 4A current-carrying wire creates a magnetic field that exerts a force on the compass needle.✓
Correct answer
A current-carrying wire creates a magnetic field that exerts a force on the compass needle.
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