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A hot plate of an electric oven connecte...

A hot plate of an electric oven connected to a 220 V line has two resistance coils A and B, each of `24Omega` resistance, which may be used separately, in series or in parallel. What are the currents in the three cases?

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Case [i] `R=24+24=48Omega`
`I=V/R=220/48=4.6A`
Case [ii] `1/R=1/24+1/24=2/24=1/12`
`R=12Omega`
Therefore `I=220/12=18.3A`.
Case [iii] `I=V/R=220/24=9.2A`.
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ZEN PUBLICATION-ELECTRICITY-QUESTIONS SECTION (TEXTUAL EXERCISE)
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  15. A hot plate of an electric oven connected to a 220 V line has two resi...

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  17. Two lamps, one rated 100 W at 220 V, and the other 60 W at 220 V, are ...

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  19. An electric heater of resistance 8Omega draws 15 A from the service ma...

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  20. Explain the following. a] Why is tungsten used almost exclusively fo...

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