JEE Main 2024 (Online) 30th January Evening Shift | Dual Nature of Radiation Question 18 | Physics

For the photoelectric effect, the maximum kinetic energy $$\left(E_k\right)$$ of the photoelectrons is plotted against the frequency $$(v)$$ of the incident photons as shown in figure. The slope of the graph gives

JEE Main 2024 (Online) 30th January Evening Shift Physics - Dual Nature of Radiation Question 15 English

Planck's constant

Work function of the metal

Charge of electron

Ratio of Planck's constant to electric charge

JEE Main 2024 (Online) 30th January Evening Shift

MCQ (Single Correct Answer)

-1

If the total energy transferred to a surface in time $$\mathrm{t}$$ is $$6.48 \times 10^5 \mathrm{~J}$$, then the magnitude of the total momentum delivered to this surface for complete absorption will be:

$$2.16 \times 10^{-3} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$$

$$2.46 \times 10^{-3} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$$

$$1.58 \times 10^{-3} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$$

$$4.32 \times 10^{-3} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$$

JEE Main 2024 (Online) 30th January Morning Shift

MCQ (Single Correct Answer)

-1

The work function of a substance is $$3.0 \mathrm{~eV}$$. The longest wavelength of light that can cause the emission of photoelectrons from this substance is approximately;

215 nm

400 nm

414 nm

200 nm

JEE Main 2024 (Online) 29th January Evening Shift

MCQ (Single Correct Answer)

-1

Two sources of light emit with a power of $$200 \mathrm{~W}$$. The ratio of number of photons of visible light emitted by each source having wavelengths $$300 \mathrm{~nm}$$ and $$500 \mathrm{~nm}$$ respectively, will be :

$$5: 3$$

$$3: 5$$

$$1: 5$$

$$1: 3$$

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