Question

heat = 100J Time= 4 sec Resistance= 10ohm Potential difference=?​

Answer 1

Answer:

The answer will be 20 volt.

Explanation:

Given,

         Heat = 100J;

         Resistance = 4 ohm;

         Time = 1 second;

According to Joule's Law,

                                            H = I^{2} RTI2RT ;

                                            H = \frac{V^{2} }{R} TRV2T                  ( by V = IR )  (i)

Now put the value of given variables in equation (i);

So,                           ⇒ 100 =  \frac{V^{2} }{4} 14V21 ;                   (here, T is 1 because we are asked for every second.)

                               ⇒ 400 = V^{2}V2

                              ⇒ V = \sqrt{400}400  = 20 V

Therefore, the potential difference will be 20 V when 100 J of energy is released every second in a resistor of resistance 4 ohm.