A short electric dipole (consists of two point charges +q and -q) is placed at the centre O and inside a large cube (ABCDEFGH) of length L, as shown in the figure below. The electric flux, remaining through the cube is:
The equivalent resistance between points a and f of the network as shown in the figure below is:
A moving electron enters a uniform and perpendicular magnetic field. Inside the magnetic field, the electrons travels along,
a straight line
A fish which is at a depth of 12 cm in water () is viewed by an observer on the bank of a lake. It's apparent depth as observed by the observer is:
If EP and EK represent potential energy and kinetic energy respectively, of an orbital electron, then according to the Bohr's theory:
Ek = -EP/2
Ek = -EP
Ek = -2EP
Ek = -2EP
A resistor R is connected to a cell of emf e and internal resistance r. Potential difference across the resistor R is found to be V. State the relation between e, V, R and r.
Three identical cells of emf 2V internal resistance 1 ohm are connected in series to form a battery. The battery is then connected to a parallel combination of two identical resistors, each of resistance 6 ohm. Find the current delivered by the battery.
State how magnetic susceptibility is different for the three types of magnetic material, i.e., diamagnetic, paramagnetic and ferromagnetic materials.
An emf of 2 V is induced in a coil when current in it is changed from 0A to 10 A in 0.40 sec. Find the coefficient of self-inductance of the coil.