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A straight wire of diameter 0.5 mm carrying a current of 1 A is replaced by another wire of 1 mm diameter carrying the same current. The magnetic field far away will be
  • a)
    twice the earlier value
  • b)
    same as the earlier value
  • c)
    one-half of the earlier value
  • d)
    one-quarter of the earlier value
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
A straight wire of diameter 0.5 mm carrying a current of 1 A is replac...
Explanation:

The magnetic field far away from a current-carrying wire depends on the current flowing through the wire and the distance from the wire. It does not depend on the diameter of the wire.

When a wire of diameter 0.5 mm carrying a current of 1 A is replaced by another wire of 1 mm diameter carrying the same current, the current through the wire remains the same. Therefore, the magnetic field far away from the wire will also remain the same.

Hence, the correct answer is option 'B' - same as the earlier value.
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Community Answer
A straight wire of diameter 0.5 mm carrying a current of 1 A is replac...
Explanation:
The magnetic field far away from the wire depends on the current flowing through the wire and the distance from the wire. The diameter of the wire is not a factor in determining the magnetic field. Therefore, the magnetic field far away from the wire will be the same for both wires.

Reasoning:
• The magnetic field far away from a wire depends on the current flowing through the wire and the distance from the wire.
• The diameter of the wire does not affect the magnetic field far away from the wire.
• Therefore, replacing a wire of diameter 0.5 mm carrying a current of 1 A with another wire of 1 mm diameter carrying the same current will not change the magnetic field far away from the wire.
• Hence, option 'B' is the correct answer.
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A straight wire of diameter 0.5 mm carrying a current of 1 A is replaced by another wire of 1 mm diameter carrying the same current. The magnetic field far away will bea)twice the earlier valueb)same as the earlier valuec)one-half of the earlier valued)one-quarter of the earlier valueCorrect answer is option 'B'. Can you explain this answer?
Question Description
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