JEE Main 2022 (Online) 26th June Evening Shift | Atoms and Nuclei Question 58 | Physics

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JEE Main 2022 (Online) 26th June Evening Shift

MCQ (Single Correct Answer)

-1

Which is the correct ascending order of wavelengths?

$$\lambda$$_visible < $$\lambda$$_X-ray < $$\lambda$$_gamma-ray < $$\lambda$$_microwave

$$\lambda$$_gamma-ray < $$\lambda$$_X-ray < $$\lambda$$_visible < $$\lambda$$_microwave

$$\lambda$$_X-ray < $$\lambda$$_gamma-ray < $$\lambda$$_visible < $$\lambda$$_microwave

$$\lambda$$_microwave < $$\lambda$$_visible < $$\lambda$$_gamma-ray < $$\lambda$$_X-ray

JEE Main 2022 (Online) 26th June Evening Shift

MCQ (Single Correct Answer)

-1

A radioactive nucleus can decay by two different processes. Half-life for the first process is 3.0 hours while it is 4.5 hours for the second process. The effective half-life of the nucleus will be:

3.75 hours

0.56 hours

0.26 hours

1.80 hours

JEE Main 2022 (Online) 26th June Morning Shift

MCQ (Single Correct Answer)

-1

An electron with speed v and a photon with speed c have the same de-Broglie wavelength. If the kinetic energy and momentum of electron are E_e and p_e and that of photon are E_ph and p_ph respectively. Which of the following is correct?

$${{{E_e}} \over {{E_{ph}}}} = {{2c} \over v}$$

$${{{E_e}} \over {{E_{ph}}}} = {v \over {2c}}$$

$${{{p_e}} \over {{p_{ph}}}} = {{2c} \over v}$$

$${{{p_e}} \over {{p_{ph}}}} = {v \over {2c}}$$

JEE Main 2022 (Online) 25th June Evening Shift

MCQ (Single Correct Answer)

-1

A proton, a neutron, an electron and an $$\alpha$$ particle have same energy. If $$\lambda$$_p, $$\lambda$$_n, $$\lambda$$_e and $$\lambda$$_a are the de Broglie's wavelengths of proton, neutron, electron and $$\alpha$$ particle respectively, then choose the correct relation from the following:

$$\lambda$$_p = $$\lambda$$_n > $$\lambda$$_e > $$\lambda$$_a

$$\lambda$$_a < $$\lambda$$_n < $$\lambda$$_p < $$\lambda$$_e

$$\lambda$$_e < $$\lambda$$_p = $$\lambda$$_n > $$\lambda$$_a

$$\lambda$$_e = $$\lambda$$_p = $$\lambda$$_n = $$\lambda$$_a

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