A photocell is illuminated by a monochromatic light source with intensity $I$ and frequency $

u$. If the intensity is doubled while keeping the frequency constant, which of the following statements is TRUE regarding the photocurrent and stopping potential?

The maximum velocity of the photoelectrons emitted from the surface is v when light of frequency n falls on a metal surface. If the incident frequency is increased to $3\mu$, the maximum velocity of the ejected photoelectrons will be

A 100 W light bulb is placed at the centre of a spherical chamber of radius 0.10m. Assume that 66% of the energy supplied to the bulb is converted into light and that the surface of chamber is perfectly absorbing. The pressure exerted by the light on the surface of the chamber is

A photocell is connected in series with a variable resistor and a sensitive ammeter. The cathode of the photocell is illuminated with monochromatic light of constant intensity. As the resistance of the variable resistor is increased, what happens to the photocurrent and the stopping potential?

Photo cell is a device to

The work function of a metal is $\phi$. Light of frequency $f$ is incident on the metal. If $f < \phi/h$, which of the following is true?

When a monochromatic point source of light is at a distance 0.2 m from a photoelectric cell, the saturation current and cut-off voltage are 12.0 mA and 0.5 V. If the same source is placed 0.4 m away from the photoelectric cell, then the saturation current and the stopping potential respectively are

An $\alpha$-particle of mass $6.4 imes {10^{ - 27}}$kg and charge $3.2 imes {10^{ - 19}}$ C is situated in a uniform electric field of $1.6 imes {10^5}\;{\rm{V}}{{\rm{m}}^{ - 1}}.$ The velocity of the particle at the end of $2 imes {10^{ - 2}}$ m path when it starts from rest is

Which of the following best describes the principle behind the working of a photocell?

Photons of energy $5\,eV$ strike a metal cathode. The maximum kinetic energy of the emitted photoelectrons is $1\,eV$. If the incident photon energy is increased to $7\,eV$, what will be the maximum kinetic energy of the emitted photoelectrons (in $eV$) ?

Which of the following factors does not affect the stopping potential in a photocell experiment?