JEE · NEET Previous Year Question
Astraightwireofdiameter0.5mmcarrying a current of 1 A is replaced by the another wire of 1 mm diameter carrying the same current. The strength of the magnetic field far away is
Topic: NEET PYQ
Answer: D. Full step-by-step solution below.
- Aone‐quarter of the earlier value
- Bone‐half of the earlier value
- Ctwice the earlier value
- Dsame as the earlier value.
Correct answer: D
Solution
(d) Diameter of first wire 0. ; Current in first wire ; Diameter of second wire mm and current in second wireStrength of magnetic field due to current flowing in a conductor, or Since the current in both the wires is same, therefore there is no change in the strength of the magnetic field.
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