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The essential difference between a d.c d...

The essential difference between a `d.c` dynamo and an `a.c` dynamo is that

A

a.c. has an electromagent but d.c. has a permanent magnet

B

a.c. will generate a higher voltage

C

a.c. has slip rings but the d.c has a commutator

D

a.c. dynamo has a coil wound on soft iron, but the d.c. dynamo has a coil wound on copper

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NARAYNA-ALTERNATING CURRENT-C.U.Q
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  7. Power factor is defined as

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  10. A transformer changes the voltage

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  12. The ratio of primary voltage to secondary voltage in a transformer is ...

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  13. In a step down transformer, the number of turns in the primary is alwa...

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  14. The transformer ratio of a step up transformer is

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  15. A setup transformer develops 440 V in secondary coil for an input of 2...

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