Physics · Electromagnetic Induction
A small circular wire loop of radius 'a' and number of turns N, is oriented with its axis parallel to the direction of a local uniform magnetic field B. A resistance R and a galvanometer are connected to the coil. When the coil is flipped (i.e., the direction of its axis is completely reversed), the galvanometer measures the total charge Q that flows through it. The total charge Q is equal to:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 12 π N a2 BR✓
- 2√2 π N a2 BR
- 3π N a2 BR
- 4π N a2 B2R
Correct answer
2 π N a2 BR
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