1
JEE Main 2023 (Online) 25th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The ratio of the density of oxygen nucleus ($$_8^{16}O$$) and helium nucleus ($$_2^{4}\mathrm{He}$$) is

A
4 : 1
B
1 : 1
C
2 : 1
D
8 : 1
2
JEE Main 2023 (Online) 24th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
An $$\alpha$$-particle, a proton and an electron have the same kinetic energy. Which one of the following is correct in case of their de-Broglie wavelength:
A
$${\lambda _\alpha } > {\lambda _p} < {\lambda _e}$$
B
$${\lambda _\alpha } > {\lambda _p} > {\lambda _e}$$
C
$${\lambda _\alpha } = {\lambda _p} = {\lambda _e}$$
D
$${\lambda _\alpha } < {\lambda _p} < {\lambda _e}$$
3
JEE Main 2023 (Online) 24th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Consider the following radioactive decay process

$$_{84}^{218}A\buildrel \alpha \over \longrightarrow {A_1}\buildrel {{\beta ^ - }} \over \longrightarrow {A_2}\buildrel \gamma \over \longrightarrow {A_3}\buildrel \alpha \over \longrightarrow {A_4}\buildrel {{\beta ^ + }} \over \longrightarrow {A_5}\buildrel \gamma \over \longrightarrow {A_6}$$

The mass number and the atomic number of A$$_6$$ are given by :

A
210 and 84
B
210 and 80
C
211 and 80
D
210 and 82
4
JEE Main 2022 (Online) 29th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

An $$\alpha$$ particle and a proton are accelerated from rest through the same potential difference. The ratio of linear momenta acquired by above two particles will be:

A
$$\sqrt2$$ : 1
B
2$$\sqrt2$$ : 1
C
4$$\sqrt2$$ : 1
D
8 : 1
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