Two cells , each of `emf E` and internal resistance `r`, are connected in parallel across a resistor `R`. The power delivered to the resistor is maximum if `R` is equal to

Two identical cells each of emf E and internal resistance r are connected in parallel with an external resistance R. To get maximum power developed across R, the value of R is

n cells, each having emf. E and internal resistance r are connected in parallel. What is the net internal resistance of the combination?

A cell of emf epsilon and internal resistance r is connected across a load resistance R (i) Find the maximum power delivered at the load ? .

n identical cells each of emf epsilon and lnternal resistance r are connected in parallel with resistor R. The current nowing through resistor R is ..........

An external resistance R is connected to a battery of e.m.f. V and internal resistance r . The joule heat produced in resistor R is maximum when R is equal to

A battery of e.m.f. E and internal resistance r is connected to a variable resistor R as shown here. Which one of the following is true

A cell of emf epsi and internal resistance r is connected across a load resistance R . (i) Find the maximum power delivered at the load ? (ii) Draw the power (P) vs load resistance (R) graph .