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The frequency of direct current (d.c.) i...

The frequency of direct current (d.c.) is :

A

0 Hz

B

50 Hz

C

60 Hz

D

100 Hz

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Verified by Experts

The correct Answer is:
A
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LAKHMIR SINGH & MANJIT KAUR-MAGNETIC EFFECT OF ELECTRIC CURRENT -Exercise
  1. A d.c. generator is based on the priciple of :

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  2. An idduced emf is produced when a magnet is plunged into a coil. The m...

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  3. The frequency of direct current (d.c.) is :

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  4. The frequency of alternating current (a.c.) supply in India is :

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  5. When the magnet shown in the diagram below is movoing towards the co...

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  6. If you hold a coil of wire next to a magnet,no current will flow i...

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  7. The wire in Figure below is being moved downwards through the mag...

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  8. Two coils A and B of insulated to wire are kept close to each ...

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  9. A portable radio has a built in transformer so that it can work f...

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  10. What name is given to the device which automatically cuts off the ...

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  11. What is the capacity of an electric fuse used in (i) lighting circuit ...

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  12. Given the symbol of an electric fuse used in circuit diagrams.

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  13. State whether the following statements are ture of false: (a) A wi...

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  14. What is the advantage of the third wire of each connection in domestic...

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  15. List the colours of the three wires in the cable connected to the p...

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  16. If fuse of 250 mA, 500 mA, 1 A, 5 A, and 10 A were available, which ...

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  17. When does an electric short-circuit occur?

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  18. In which wire in a A.C. Housing circuit is the swicth introduced...

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  19. In household circuits, is a fuse wire connected in series or in parall...

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  20. Give two reasons why different electrical appliances in a domestic cir...

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