Question

establish the expression for current flowing through an external resistance R connected to a cell of emf E and internal resistance r.​

Answer 1

Answer: Expression of current will be equal to E/R+r

Explanation: Let the emf of the battery is E

External resistance is R

And internal resistance of the battery is r

As the battery is connected in series with the circuit

So total equivalent resistance = R+r

According to ohm's law current is given by

So the expression of current will be equal to  

Learn more

Two cells one of e.m.f. 2 volt and internal resistance of 0.5 ohms and the other of e.m.f. 1.5 volt

and internal resistance 5 ohms are connected in parallel and used to send a current through an

external resistance of 4 ohms. Calculate the current in each part of the circuit.​