MCQ
For photo-electric effect with incident photon wavelength $\lambda$, the stopping potential is $V _0$. Identify the correct variation$(s)$ of $V _0$ with $\lambda$ and $1 / \lambda$. $Image$
  • A
    $(B,D)$
  • B
    $(B,C)$
  • $(A,C)$
  • D
    $(A,D)$

Answer

Correct option: C.
$(A,C)$
c
For photoelectric emission

$V _0=\left(\frac{ hc }{ e }\right) \frac{1}{\lambda}-\frac{\phi}{ e }$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A screen is placed $90\;cm$ from an object. The image of the object on the screen is formed by a convex lens at two different locations separated by $20\;cm$. Determine the focal length (in $cm$) of the lens.
Three harmonic waves having equal frequency $\mathrm{v}$ and same intensity $\mathrm{I}_{0}$, have phase angles $0 , \frac{\pi}{4}$ and $-\frac{\pi}{4}$ respectively. When they are superimposed the intensity of the resultant wave is close to
The value of the resistance $R$ in figure is adjusted such that power dissipated in the $2\,\Omega $ resistor is maximum. Then the power dissipated in the $2\,\Omega $ will be ................ $W$
The amplitude of two waves are in ratio $5 : 2$. If all other conditions for the two waves are same, then what is the ratio of their energy densities
Which of the following figures correctly depicts the direction of magnetic field of a current-carrying coil ?
Three surfaces of liquid are shown here. Find the correct statements
A circular loop of radius $0.3\, cm$ lies parallel to a much bigger circular loop of radius $20 \,cm$. The centre of the small loop on the axis of the bigger loop. The distance between their centres is $15\, cm$. If a current of $20\, A$ flows through the smaller loop, then the flux linked with bigger loop is
On a frictionless surface, a block of mass M moving at speed v collides elastically with another block of the same mass M which is initially at rest. After the collision, the first block moves at an angle $\theta$ to its initial direction and has a speed $\frac{v}{3}$.The second block's speed after the collision is .
In the given figure, the value of $V_{0}$ will be $.....V$.
If two metallic plates of equal thicknesses and thermal conductivities ${K_1}$ and ${K_2}$ are put together face to face and a common plate is constructed, then the equivalent thermal conductivity of this plate will be