Photoelectric effect is the phenomenon in which - Vidyadip

MCQ

Photoelectric effect is the phenomenon in which

A
Photons come out of a metal when it is hit by a beam of electrons.
B
Photons come out of the nuclues of an atom under the action of an electric field
C
Electrons come out of a metal with a constant velocity which depends on the frequency and intensity of incident light wave.
✓
Electrons come out of a metal with different velocities not greater than a certain value which depends only on the frequency of the incident light wave and not on its intensity.

✓

Answer

Correct option: D.

Electrons come out of a metal with different velocities not greater than a certain value which depends only on the frequency of the incident light wave and not on its intensity.

d
Total energy $= PE + KE$

$KE _{\max }= T ($ total energy)

So, velocity cannot be greater than velocity corresponding to $KE _{\max }$.

The photoelectric effect refers to the emission, or ejection, of electrons from the surface of, generally, a metal in response to incident light. The energy contained within the incident light is absorbed by electrons within the metal, giving the electrons sufficient energy to be 'knocked' out of, that is, emitted from, the surface of the metal.

$h \nu=h \nu o+K E$

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

Explore more

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

Similar questions

For the cell $\mathrm{Cu}(\mathrm{s})\left|\mathrm{Cu}^{2+}(\mathrm{aq})(0.1 \mathrm{M}) \| \mathrm{Ag}^{+}(\mathrm{aq})(0.01 \mathrm{M})\right| \mathrm{Ag}(\mathrm{s})$ the cell potential $\mathrm{E}_{1}=0.3095\, \mathrm{~V}$

For the cell $\mathrm{Cu}(\mathrm{s})\left|\mathrm{Cu}^{2+}(\mathrm{aq})(0.01 \mathrm{M}) \| \mathrm{Ag}^{+}(\mathrm{aq})(0.001 \mathrm{M})\right| \mathrm{Ag}(\mathrm{s})$ the cell potential $=.....\times 10^{-2} \mathrm{~V}$

(Round off to the Nearest Integer).

[Use: $\frac{2.303 \mathrm{RT}}{\mathrm{F}}=0.059$ ]

Consider the acidity of the carboxylic acids Which of the following order is correct?

$(a)$ $PhCOOH$

$(B)$ $o-NO_2C_6H_4COOH$

$(C)$ $p-NO_2C_6H_4COOH$

$(D)$ $m-NO_2C_6H_4COOH$

Among the following complexes the one which shows Zero crystal field stabilization energy $(CFSE)$ is

Which branched chain isomer of the hydrocarbon with molecular mass $72\,u$ gives only one isomer of mono substituted alkyl halide ?

Which one of the following statements regarding Henry’s law is not correct?

Methyl acetate and propionic acid are

A sample of $NaClO_3$ is converted by heat to $NaCl$ with a loss of $0.16\, g$ of oxygen. The residue is dissolved in water and precipitated as $AgCl$. The mass of $AgCl$ (in $g$) obtained will be (Given: Molar mass of $AgCl = 143.5\, g\,mol^{-1}$ )

Wilkinson's catalyst used as a homogeneous catalyst in the hydrogenation of alkenes contains

The weight of a molecule of the compound ${C_{60}}{H_{122}}$ is

Among halogens, the one which can oxidise water to oxygen is: