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Heater of an electric kettle is made of a wire of length L and diameter d. It takes 4 minutes to raisethe temperature of 0.5 kg water by 40 K. This heater is replaced by a new heater having two wiresof the same material, cach of length L and diameter 2d. The way these wires are connected is givenin the options. How much time in minutes will it take to raise the temperature of the same amount ofwater by 40 K ?(A) 4 if wires are in parallel(C) 1 if wires are in series51.\lbrack JEE Advanced 2014\rbrack(B) 2 if wires are in series(D) 0.5 if wires are in parallel |
| Answer» Heater of an electric kettle is made of a wire of length L and diameter d. It takes 4 minutes to raisethe temperature of 0.5 kg water by 40 K. This heater is replaced by a new heater having two wiresof the same material, cach of length L and diameter 2d. The way these wires are connected is givenin the options. How much time in minutes will it take to raise the temperature of the same amount ofwater by 40 K ?(A) 4 if wires are in parallel(C) 1 if wires are in series51.\lbrack JEE Advanced 2014\rbrack(B) 2 if wires are in series(D) 0.5 if wires are in parallel | |