JEE Main 2024 (Online) 4th April Evening Shift | Dual Nature of Radiation Question 11 | Physics

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JEE Main 2024 (Online) 4th April Evening Shift

MCQ (Single Correct Answer)

-1

Given below are two statements: one is labelled as Assertion $$\mathbf{A}$$ 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:

$$\mathbf{A}$$ is not correct but $$\mathbf{R}$$ is correct.

$$\mathbf{A}$$ is correct but $$\mathbf{R}$$ is not correct.

Both $$\mathbf{A}$$ and $$\mathbf{R}$$ are correct and $$\mathbf{R}$$ is the correct explanation of $$\mathbf{A}$$.

Both $$\mathbf{A}$$ and $$\mathbf{R}$$ are correct and $$\mathbf{R}$$ is NOT the correct explanation of $$\mathbf{A}$$.

JEE Main 2024 (Online) 4th April Morning Shift

MCQ (Single Correct Answer)

-1

Which figure shows the correct variation of applied potential difference (V) with photoelectric current (I) at two different intensities of light $$(\mathrm{I}_1<\mathrm{I}_2)$$ of same wavelengths :

JEE Main 2024 (Online) 4th April Morning Shift Physics - Dual Nature of Radiation Question 10 English Option 1

JEE Main 2024 (Online) 4th April Morning Shift Physics - Dual Nature of Radiation Question 10 English Option 2

JEE Main 2024 (Online) 4th April Morning Shift Physics - Dual Nature of Radiation Question 10 English Option 3

JEE Main 2024 (Online) 4th April Morning Shift Physics - Dual Nature of Radiation Question 10 English Option 4

JEE Main 2024 (Online) 1st February Evening Shift

MCQ (Single Correct Answer)

-1

Monochromatic light of frequency $6 \times 10^{14} \mathrm{~Hz}$ is produced by a laser. The power emitted is $2 \times 10^{-3} \mathrm{~W}$.

How many photons per second on an average, are emitted by the source ?

(Given $\mathrm{h}=6.63 \times 10^{-34} \mathrm{Js}$ )

$5 \times 10^{15}$

$7 \times 10^{16}$

$6 \times 10^{15}$

$9 \times 10^{18}$

JEE Main 2024 (Online) 1st February Evening Shift

MCQ (Single Correct Answer)

-1

Conductivity of a photodiode starts changing only if the wavelength of incident light is less than $660 \mathrm{~nm}$. The band gap of photodiode is found to be $\left(\frac{\mathrm{X}}{8}\right) \mathrm{eV}$. The value of $\mathrm{X}$ is :

(Given, $\mathrm{h}=6.6 \times 10^{-34} \mathrm{Js}, \mathrm{e}=1.6 \times 10^{-19} \mathrm{C}$ )

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