1. Draw a graph showing variation of photocurrent with anode pote… - Vidyadip

Question

Draw a graph showing variation of photocurrent with anode potential for a particular intensity of incident radiation. Mark saturation current and stopping potential.
By how much would the stopping potential for a given photosensitive surface go up if the frequency of the incidentradiations were to be increased from $4\times10^{15}\text{ }\text{Hz}\text{ }\text{to}8\text{ }\times10^{15}\text{ }\text{Hz}$?

✓

Answer

Graph:

We know that $e\text{V}_0=hv-\phi$

$\therefore{e{\text{V}_1}}=hv_1-\phi$

and ${e{\text{V}_2}}=hv_2-{\phi}$

Increase in potential

$\therefore\text{V}_2-\text{V}_1=\frac{h}{e}(v_2-v _1)$

$ =\frac{6.63\times10^{-34}}{1.6\times10^{-19}}(8\times10^{15}-4\times10^{15})\text{V}$

$=16.5\text{ }\text{V}$

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

Explore more

More "3 Marks Question" from Dual Nature of Radiation and Matter→Dual Nature of Radiation and Matter — all question types→Physics STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

Write the basic nuclear process involved in the emission of$\beta^{+}$ in a symbolic form, by a radioactive nuclear.
in the reactions given below:

$^{11}_{6}\text{C}\rightarrow ^{\text{z}}_{\text{y}}\text{B} + \text{x} + \text{v}$
$^{12}_{6}\text{C}\rightarrow ^{12}_{6}\text{C}\rightarrow^{20}_{\text{a}}\text{Ne} + ^{c}_{b}\text{He}$

Find the values of x,y, and z and a,b and c.

There are two sources of light A and B. The wavelength of light emitted from A is from $8000\mathring{\text{A}}$ to $11000\mathring{\text{A}},$ while that from B is from $3000\mathring{\text{A}}$ to $6000\mathring{\text{A}}.$ The intensity of A is 4 times that of B. But when light of A falls on metal, photoelectrons are not emitted whereas light of B can eject photoelectrons from the same metal. Explain its reason.

Two capacitors of unknown capacitances C₁ and C₂ are connected first in series and then in parallel across a battery of 100 V. If the energy stored in the two combinations is 0.045 J and 0.25 J respectively, determine the value of C₁ and C₂. Also calculate the charge on each capacitor in parallel combination.

Explain how the scattering experiment can be analyzed in detail from Rutherford's nuclear model.

Drive the expression for electric field at a point on the equatorial line of an electric dipole.
Depict the orientation of the dipole in (i) stable, (ii) unstable equilibrium in a uniform electric field.

Name two important processes that occur during the formation of a pn junction.
Draw the circuit diagram of a full wave rectifier along with the input and output waveforms. Briefly, explain how the output voltage/current is unidirectional.

A metal wire PQ of mass 10g lies at rest on two horizontal metal rails separated by 4.90cm A vertically-downward magnetic field of magnitude 0.800T exists in the space. The resistance of the circuit is slowly decreased and it is found that when the resistance goes below 20.0Ω, the wire PQ starts sliding on the rails. Find the coefficient of friction.

The magnetic field at a point inside a 2.0mH inductor coil becomes 0.80 of its maximum value in 20µs when the inductor is joined to a battery. Find the resistance of the circuit.

What is linearly polarized light? Describe briefly using a diagram how sunlight is polarised.
Unpolarised light is incident on a polaroid. How would the intensity of transmitted light change when the polaroid is rotated?

A particle is released from the top of an incline of height h. Does the kinetic energy of the particle at the bottom of the incline depend on the angle of incline? Do you need any more information to answer this question in Yes or No?