Photoelectric effect -1

In photoelectric effect, an increases in the current increases with

• Intensity

• frequency

• Anode potential

• None of these

To eject an electron, minimum energy is required. This energy is called

• Potential energy

• Kinetic energy

• work function

• Heat energy

The phenomenon of emission of electrons from a metal surface when UV light is incident is

• Thermionic emission

• Electrical emission

• Photoelectric effect

• Field emission

When the cathode is incident by two different frequencies of light with constant intensity, the stopping potential will be

• constant

• different

The stopping potential for different intensity with same frequency of light is

• same

• different

"When the intensity increases; the number of photons increases; number of ejected electrons increases and finally the current in the circuit increases."

• FALSE

• TRUE

The kinetic energy of ejected electron depends on

• Intensity of incident radiation

• frequency of incident radiation

• Anode potential

• None of these

A dim light with frequency greater than threshold frequency can eject electrons from metal surface.

• TRUE

• FALSE

The minimum frequency of light required for photoelectric emission is called

• threshold wavelength

• threshold frequency

• threshold velocity

• threshold speed

A particle of light is called a...

• 
  

  Photoelectron

• Photon

• Electron

• Proton