Figure shows a situation similar to the previous problem. All parameters are the same except that a battery of emf `epsilon` and a variable resistance R are connected between O and C. The connecting wires have zero resistance. No external force is applied on the rod (except gravity, forces by the magnetic field and by the pivot).

In what way should the resistance R be changed so that the rod may rotate with uniform angular velocity in the clockwise direction? Express your answer in terms of the given quantities and the angle `(theta)` made by the rod OA with the horizontal.

Shows a situation similar to the previous problem. All parameters are the same except that a battery of emf epsilon and a variable resistance R are connected wires. Let theta be the angle made by the rod from the horizontal position (shown in the figurer), measuredin the clockwise direction. During the part of the motion Oltthetaltpi/4 the only forces acting on the rod are gravity and the forces exerted by the magnetic field and the pivot. However, during the part of the motion, the resistance R is varied in such a way that the rod continues to rotate with a constant angular velocity omega . Find the value of R in terms of the given quantities.

What maximum power can be obtained from a battery of emf epsilon and internal resistance r connected with an external resistance R ?

A battery of emf E and internal resistance 'r' is connected to an external resistance 'R', the condition for maximum power transfer is

A battery of emf epsilon and internal resistance r sends currents I_(1) and I_(2) , when connected to external resistance R_(1) and R_(2) respectively. Find the emf and internal resistance of the battery.

A cell of emf epsilon and internal resistance r is connected across a variable load resistance R. The graph drawn between its terminal voltage and resistance R is

A battery of e.m.f epsilon and internal resistance r is connected to an external resistance R to complete the circuit. Show that the battery of delivers the maximum power to R, when R=r.

Two batteries each of emf epsilon and internal resistance r, are connected in parallel. If we take current from this combination in a external resistance R, then for what value of R maximum power will beobtained? What will be this power?

Two batteries each of emf epsilon and internal resistance r, are connected in parallel. If we take current from this combination in a external resistance R, then for what value of R maximum power will beobtained? What will be this power?

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