1.

100 J of heat is produced each second in a 4Ω resistor. The potential difference across the resistor will be:

Answer»

The answer will be 20 volt.Explanation: Given,          Heat = 100J;          Resistance = 4 ohm;          Time = 1 second;ACCORDING to Joule's LAW,                                             H = ;                                             H =                  ( by V = IR )  (i)Now put the value of given VARIABLES in equation (i);So,                           ⇒ 100 =   ;                   (here, T is 1 because we are ASKED for every second.)                                ⇒ 400 =                               ⇒ V =  = 20 VTherefore, the potential difference will be 20 V when 100 J of energy is released every second in a resistor of resistance 4 ohm.



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