Question

a 3 watt battery connected to a a 12 ohm resistance through a key if the current is switched on for 20 second the charge that will pass through the circuit will be​

Answer 1

Answer:

given:  P=3W

            R=12Ω

            T=20 sec

               = 0.33mins

find: I=?

sol: p=i*i*r

        p=vi

        3=v*v/r

        3=V^2/12

         v=1 /2

now

           p=vi

           3=1/2*i

          i=6A

pls mrk as brainliest