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A choke coil is preferred to a resistanc...

A choke coil is preferred to a resistance for reducing current in an ac circuit because .

A

choke coil is cheaper

B

choke coil is easier to design

C

choke coil consumers much less power

D

the eddy currents produced in a choke coil reduce the current .

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The correct Answer is:
C
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CP SINGH-ALTERNATING CURRENT-EXERCISES
  1. In previous question the resistance of coil A is .

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  2. A choke coil has.

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  3. A choke coil is preferred to a resistance for reducing current in an a...

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  4. An electric lamp which runs at 80 volt d.c. and consumes 10 ampere is ...

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  5. In the circuit shown, R is a pure resistor, L is an inductor of neglig...

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  6. A capacitor and an inductor are connected in parallel across an ac sou...

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  7. In the given circuit the current drawn from the source is .

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  8. An inductor of 10mH an a capacitor of 16mF are connected in the circui...

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  9. The AC voltage across a resistance can be measured using

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  10. Alternating current can be measured by

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  11. Hot wire ammeters can be used for measuring

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  12. In the given circuit, the AC source has (omega) = 100 rad//s. Consider...

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  13. In a dc motor if E is the applied emf and e is the back emf then the e...

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  14. Armature current in dc motor will be maximum when

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  15. The armature of a dc motor has 20 Omega resistance It draws a currrent...

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  16. In a step - down transformer the input voltage is 22kV and the output ...

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  17. An ideal transformer is used to step up an alternating emf of 220V to ...

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  18. in a transformer the number of rurns in the primary and secondary coil...

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  19. in a step-up transformer, the turn ratio is 1:2 leclanche cell (e.m.f....

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  20. Eddy currents are produced in a matterial when it is

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