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6. Electromagnetic induction — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics6. Electromagnetic induction1 Mark
MCQ
In an induction coil, the secondary $e.m.f.$ is
  • A
    Zero during break of the circuit
  • B
    Very high during make of the circuit
  • C
    Zero during make of the circuit
  • ✓
    Very high during break of the circuit
✓

Answer

Correct option: D.
Very high during break of the circuit
d
When the circuit break, current in circuit become zero in very small time. therefore $\frac{\text { di }}{\text { di }}$ will be high.Hence induce e.m.f. will be high.

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