LMS

Which region of the electromagnetic spectrum will provide photons of the least energy?

What is a quantum of light called?

Why are photons of gamma rays and X-rays able to penetrate objects more successfully than ultraviolet radiation?

In photoelectric effect, electrons are ejected from metals, if the incident light has a certain minimum

The momentum of photon is

The value of Planck’s constant can be determine by equation (E = energy, = wavelength)

During the interval  the forward biased diode offers

The voltage which appears across load resistance R is called

The wavelength of light beam B is twice the wavelength of light beam B. The energy of a photon in beam A is: 

The wave theory of light does not explain

A photon in light beam A has twice the energy of a photon in light beam B. The ratio pA/pB of their momenta is:

Which one has the largest wavelength when all of the following moving with the same speed?

If momentum of a particle is doubled then de-Broglie wavelength become  

A component that allow only unidirectional current to pass through is 

Output voltage of rectifier is not smooth; it can be made by a circuit known as:

A pn junction (D. shown in the figure can act as a rectifier. An alternating current source (V) is connected in the circuit. The output current in the circuit is represented by: 

In half wave rectifier, the output voltage is taken across_______

During the Davisson-Germer experiment what was proved 

In a half wave rectifier, the current through load resistance flows only in

The most common device used as filter is

Output of half wave rectifier is suitable only

A photon of frequency f has a momentum associated with it. If c is the velocity of light, this momentum is

What wavelength must electromagnetic radiation have if a photon in the beam is to have the same momentum as an electron moving with speed v?

The particle nature of light is not confirmed by

In the given figure the current through the resistor is practically.

In the following figure what happens for the positive half cycle of the input?

Electrically, photons are

A photon is ____________ 

For single phase supply frequency of 50 Hz, ripple frequency in full wave rectifier is

In an half wave rectifier, the input sine wave is 250sin100 pt. The output ripple frequency of rectifier will be

Rectifier allows unidirectional current through load during entire 360° of input cycle is

A semi-conductor can be used as a rectifier because

Frequency of photon having energy 66 eV is

If the energy of the photon is increased by a factor of 4, then its momentum

Of the following properties, the photon does not possess

In Compton scattering from stationary electrons the largest change in wavelength occurs when the photon is scattered through

Energy of photon whose frequency is 1012MHz, will be 

Which one has the largest wavelength when all of the following moving with the same speed?

Which of the following has lower energy quanta?

An atomic particle of mass m moving at speed v is found to have wavelength . What is the wavelength of second particle with three times the speed and twice the mass?

A photon in motion has a mass

The energy of a photon of wavelength    is

Photoelectric effect shows

When light is incident on a metal surface the maximum kinetic energy of emitted electrons

The photoelectric effect is based on the law of conservation of

Calculate the energy of a photon of wavelength 6600 angstroms.

The frequency of light beam A is twice that of light beam B. The ratio EA/EB of photon energies is:

Which of the following electromagnetic radiations has photons with the greatest momentum?

Number of photo electrons depends upon

In photoelectric effect, the graph showing the variation of cut – off voltage (V0) with the frequency of incident radiation (f) is