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Q.13.    A hot plate of an electric oven connected to a 220 V line has two resistance coils A and B, each of 24\Omega resistance, which may be used separately, in series, or in parallel. What are the currents in the three cases?


Answers (1)


Given : V=220V and Resistance of each coil=R =24A

When coil is used separately,current in coil is


When two coils are connected in series, net resistance is


current in coil is I'


When two coils are connected in parallel, net resistance is


\Rightarrow R=12\Omega

current in the coil is I''



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seema garhwal

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