A direct current of 2A and an alternating current having a maximum value of 2A flow through two identical resistances. The ratio of heat produced in the two resistances will be
(a) 1 : 1 (b) 1 : 2 (c) 2 : 1 (d) 4 : 1
Correct option (c) 2 : 1
Explanation:
Heat produced = I2 Rt
Heat produced due to direct current I2Rt = 4 Rt
Heat produced due to alternating current
