Physics · Electromagnetic Induction
Consider two coils, A, having a larger number of turns than B, kept axially at a distance from each other. Coil A is connected to a battery and a switch, and B is connected to a galvanometer. On switching on or off the circuit, a DC current flows through coil A, then the deflection in the galvanometer connected to coil B can be increased by winding the core of coil B on .
- 1a glass rod
- 2a wooden rod
- 3an iron rod✓
- 4an ebonite rod
Correct answer
an iron rod
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