Given below are two statements: one is labelled as Assertion A an… - Vidyadip

Question

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.

$Assertion$ $A$ : Number of photons increases with increase in frequency of light.

$Reason$ $R$ : Maximum kinetic energy of emitted electrons increases with the frequency of incident radiation.

In the light of the above statements, choose the most appropriate answer from the options given below :

✓

Answer

Intensity of light $\mathrm{I}=\frac{\mathrm{nh} \nu}{\mathrm{A}}$

Here $\mathrm{n}$ is no. of photons per unit time.

$\mathrm{n}=\frac{\mathrm{IA}}{\mathrm{h} v}$ so on increasing frequency $v, \mathrm{n}$ decreases taking intensity constant.

$\mathrm{k}_{\max }=\mathrm{h} v-\phi$

So on increasing $v$, kinetic energy increases.

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

NEET STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

In diode, when there is saturation current, the plate resistance $({r_p})$ is

In the following circuit, the equivalent capacitance between terminal $A$and terminal $B$ is :

A person wears glasses of power $-2.5 \,D$. The defect of the eye and the far point of the person without the glasses are respectively

For the given uniform square lamina $ABCD$ whose centre is $O$ , pick incorrect statement

$\mathop {(A)\,}\limits_{{C_7}{H_{14}}} \xrightarrow[{Zn}]{{{O_3}}}\left( B \right)\, + \,\left( C \right)$

Compound $(A)$ exist in geometrical isomers and $(B)$ gives cannizaro reaction $(A)$ will be

Figure $A$ and $B$ shown two long straight wires of circular cross-section ($a$ and $b$ with $a$ $<$ $b$), carrying current $I$ which is uniformly distributed across the cross-section. The magnitude of magnetic field $B$ varies with radius $r$ and can be represented as

A disc of mass $M$ and radius $R$ rolls in a horizontal surface and then rolls up an inclined plane as shown in the fig. If the velocity of the disc is $v$, the height to which the disc will rise will be..

The ratio ofthe radii of gyration of a circular disc about a tangential axis in the plane of the disc and of a circular ring of the same radius about a tangential axis in the plane of the ring is

In the following reaction $_{12}M{g^{24}}{ + _2}H{e^4}{ \to _{14}}S{i^X}{ + _0}{n^1},X$ is

If a diamagnetic solution is poured into a $U-$ tube and one arm of this $U-$ tube placed between the poles of a strong magnet with the meniscus in a line with the field, then the level of the solution will