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Question
- Assertion: A compass needle is placed near a current-carrying wire. The deflection of the compass needle decreases when the magnitude of the current in the wire is increased.
- Reason: The strength of a magnetic field at a point near the conductor increases by increasing the current.
Options
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, and R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
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Solution
A is false but R is true.
Explanation:
The current flowing through a conductor has a direct relationship with its magnetic field. The magnetic field's inverse proportionality to the perpendicular distance from the wire causes the needle's deflection to decrease. The amount of current flowing is always inversely correlated with the strength of the magnetic field. As a result, as the current grows, so does the magnetic field.
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