Mathematics · Magnetic Effects of Current
Two concentric circular coils of 20 turns each are situated in the same plane. Their radii are 25 cm and 45 cm respectively, and they carry 0.5 A and 0.9 A currents in opposite directions. The net magnetic field at the center is:
- 1Zero✓
- 2μ0 / 20
- 3μ0 / 4
- 4μ0 / 50
Correct answer
Zero
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