Physics Test - ...

In a transistor the collector current is always less than the emitter current because:

The work function of tungsten is \(4.50 \mathrm{eV}\). The wavelength of the fastest electron emitted when light whose photon energy is \(5.50 \mathrm{eV}\) falls on a tungsten surface, is?

A glass prism splits white light into different colours. This phenomenon is called dispersion of light by prism. Which one of the following statements is correct?

Four identical particles of mass \(M\) are located at the corners of a square of side '\(a\)'. What should be their speed if each of them revolves under the influence of others' gravitational field in a circular orbit circumscribing the square?

Calculate the displacement current between square plates in which electric field changes at the rate of \(5 \times 10^{12} {Vm}^{-1} {~s}^{-1}\). Side of plates is \(2.0 {~cm}\).

Identify the logic gate carried out by the following circuit.

Find the capacitance of the infinite ladder between points \(X\) and \(Y\) in the following figure:

The heat generated while transferring 96000 coulomb of charge in one hour through a potential difference of 50 V is:

The current carrying rectangular loop is placed in the uniform magnetic field, the torque on the loop will be maximum when the angle between the area vector and the magnetic field is:

Which of the following are quick electron emissions?