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A current loop consists of two identical semicircular parts each of radius R, one lying in the x-y plane and the other in x-z plane. If the current in the loop is i., the resultant magnetic field due to the two semicircular parts at their common centre is
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μ0i √2R -
μ0i 2√2R -
μ0i 2R -
μ0i 4R
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Correct Option: B
Magnetic fields due to the two parts at their common centre are respectively,
| By = | and = Bz = | |||
| 4R | 4R |
Resultant field = √By² + Bz
| = |  | ||||||||
 |  | ² | + | | | ² | |||
| 4R | 4R | ||||||||
| = √2, | = | |||
| 4R | 2√2R |
