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प्रश्न
In an induction coil, the coefficient of mutual inductance is 6 henry. If a current of 10 ampere in the primary coil is cut-off in `1/1500"s"`, the e.m.f. at the terminals of the secondary coil will be ____________.
विकल्प
15 kV
60 kV
10 kV
90 kV
MCQ
रिक्त स्थान भरें
उत्तर
In an induction coil, the coefficient of mutual inductance is 6 henry. If a current of 10 ampere in the primary coil is cut-off in `1/1500"s"`, the e.m.f. at the terminals of the secondary coil will be 90 kV.
Explanation:
`"e" = "M""dl"/"dt"`
` = 6 xx 10/((1/1500))`
` = 90 "kV"`
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