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प्रश्न
How does a transformer use mutual inductance?
विकल्प
It transfers energy using loosely coupled coils without physical contact.
It steps up or steps down voltage using tightly coupled coils with \[K\approx 1\] .
It makes the coil axes perpendicular so that \[M=0\] .
It induces current in cookware using the cooktop coil.
MCQ
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उत्तर
A transformer uses tightly coupled coils to step up or step down voltage. Their coupling factor is close to one: \[K\approx 1\] .
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