A cylindrical resistor dissipates thermal energy at a certain power rate, P, whe

Question

A cylindrical resistor dissipates thermal energy at a certain power rate, P, when connected to a battery. It is disconnected and cut in half lengthwise. One of the halves is then reconnected across the same battery. The new power rate for the shortened resistor is

A cylindrical resistor dissipates thermal energy at a certain power rate, , when connected to a battery. It is disconnected and cut in half lengthwise. One of the halves is then reconnected across the same battery. The new power rate for the shortened resistor is

Explanation / Answer

new resistance = R/2 ............................ P = v*v/R .....................P2 = 2v*v/R .............P2 = 2P1   so its twice

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