MHT CET · Physics · Electromagnetic Induction
Two coils have a mutual inductance of The current in the first coil changes according to equation The maximum value of e.m.f. induced in the second coil is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(A)
Step-by-step Solution
Detailed explanation
\(\because \phi=M i \)
\( e m f=\frac{d \phi}{d t}=\frac{M \cdot d i}{d t}=(0.01) \cdot(5) \cdot(200 \pi) \cdot\) \(\cos 200 \pi t \)
\( e m f=10 \pi \cdot \cos (200 \pi t) \)
\((e m f) \max =10 \pi \text { Volts }\)
\( e m f=\frac{d \phi}{d t}=\frac{M \cdot d i}{d t}=(0.01) \cdot(5) \cdot(200 \pi) \cdot\) \(\cos 200 \pi t \)
\( e m f=10 \pi \cdot \cos (200 \pi t) \)
\((e m f) \max =10 \pi \text { Volts }\)
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