# A heater is operated with a power of   in a  line. It is connected in combination with a resistance of  and a resistance  to a  line as shown in figure. What should be the value of  so, that the heater operates with a power of a) b) c) d)

## Question ID - 151124 :- A heater is operated with a power of   in a  line. It is connected in combination with a resistance of  and a resistance  to a  line as shown in figure. What should be the value of  so, that the heater operates with a power of a) b) c) d)

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Answer Key : (d) -
 (d) Resistance of heater Total resistance of circuit Current in heater

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 The masses of three wires of copper are in the ratio  and lengths are in the ratio . Then the ratio of their electrical resistances are a) b) c) d)

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