The earth does not offer any resistance, when current flows into it.

The heat produced (in calories) in a resistance R when a current I amperes flows through it for t seconds is given by the expression

A : For a given conductor , electric current does not vary even if its cross sectional area varies . R : A conductor remains unchanged when current flows through it .

A current carrying coil is placed with its plane in the magnetic meridian of the earth. When seen from east the current flowing in it appears clockwise. The magnetic. field at its centre is directed towards

In the figure shown a ring of mass M and a block of mass m are in equilibrium. The string is light and pulley P does not offer any friction and coefficient of friction between pole and M is mu. The frictional force offered by the pole to M is

A battery of emf 2V and internal resistance 0.5(Omega) is connected across a resistance 1.5(Ω). Find the current flow through battery ?

The drift velocity of free electrons in a conductor is v, when a current i is flowing in it, Ifboth the radius and current are doubled, then the drift velocity will be :

When an ideal capacitor is charged by a dc battery, no current flows. However, when an ac source is used, the current flows continuously. How does one explain this, based on the concept of displacement current ?

The magnitude of resistance X in the circuit shown in the given figure , when no current flows through the 5Omega resistor is

In the shown figure, bridge is balanced, the current flowing through 2Omega resistance is

The current enters at A and leaves at F. The values of some resistance are shown. What should be the value of resistance AB so that no current will flow through CB?