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NIKITA PUBLICATION-ELECTROMAGNETIC INDUCTION-MCQs
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- Quantity that remains unchanged in a transformer is
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- In a transformer, the number of turns in primary and secondary are 500...
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- The turn ratio of a transformers is given as 2:3. If the current throu...
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- Core of transformer is made up
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- A transformer with efficiency 80% works at 4 kW and 100 V. If the seco...
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- In a step up transformer, if ratio of turns of primary to secondary is...
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- A step-down transformer is used on a 1000 V line to deliver 20A at 120...
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- Alternating currents can be produced by a
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- An emf induced in a coil rotating in a uniform magnetic field is given...
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- The maximum value of emf indued in a coil rotating in a uniform magnet...
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- The alternaing current of equivalent value of I(0)//sqrt(2) is
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