Plot a graph showing the variation of current 'T' versus resistance 'R', connected to a cell of emf E and internal resistance 'r'.

First a set of n equal resistors of R each are connected in series to a battery of emf E and internal resistance R. A current I is observed to flow. Then, the n resistors are connected in parallel to the same battery. It is observed that the current is increased 10 times. What is 'n'?

Two resistance of 6Omega and 12 Omega are connected in parallel. Their terminals are conneted to a battery of e.m.f 4.8 V and internal resistance of 2Omega . Find the current supplied by the battery.

Plot a graph showing variation of induced emf with the rate of change of current flowing through a inductor coil.

A 10 V cell of negligible internal resistance is connected in parallel across a battery of emf 200 V and internal resistance 38 Omega as shown in the figure. Find the value of current in the circuit.

The internal resistance of a cell is the resistance of

Draw a plot showing the variation of photoelectric current versus the intensity of incident radiation on a given photosensitive surface.

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

Sketch of a graph showing variation of resistivity of carbon with temperature?