Physics Test - ...

For the circuit shown in figure the charge on $\mathrm{4 }\mathrm{\mu }\mathrm{F}$ capacitor is

A transistor oscillator is

(i) An amplifier with positive feedback

(ii) An amplifier with reduced gain

(iii) The one in which DC supply energy is converted into AC output energy. Then

The electron dirft speed is small and the charge of the electron is also small but still, we obtain large current in a conductor. This is due to

When a forward bias is applied to a PN junction diode, it

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

A particle of mass m collides with another stationary particle of mass M. If the particle  stops just after collision, the coefficient of restitution of collision is equal to

The following arrangement performs the logic function of

The points resembling equal potentials are -

Force between two identical charges placed at a distance of r in vacuum is F. Now a slab of dielectric of dielectric constant 4 is inserted between these two charges. If the thickness of the slab is r/2, then the force between the charges will become

In the figure shown below, the charge on the left plate of the $10\mathrm{\mu F}$ capacitor is $-30\mathrm{\mu C}.$ The charge on the right plate of the $6\mathrm{\mu F}$ capacitor is: