1
JEE Main 2022 (Online) 27th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

An $$\alpha$$ particle and a carbon 12 atom has same kinetic energy K. The ratio of their de-Broglie wavelengths $$({\lambda _\alpha }:{\lambda _{C12}})$$ is :

A
$$1:\sqrt 3 $$
B
$$\sqrt 3 :1$$
C
$$3:1$$
D
$$2:\sqrt 3 $$
2
JEE Main 2022 (Online) 27th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A force of 10 N acts on a charged particle placed between two plates of a charged capacitor. If one plate of capacitor is removed, then the force acting on that particle will be.

A
5 N
B
10 N
C
20 N
D
Zero
3
JEE Main 2022 (Online) 27th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The displacement of simple harmonic oscillator after 3 seconds starting from its mean position is equal to half of its amplitude. The time period of harmonic motion is :

A
6 s
B
8 s
C
12 s
D
36 s
4
JEE Main 2022 (Online) 27th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Consider a light ray travelling in air is incident into a medium of refractive index $$\sqrt{2n}$$. The incident angle is twice that of refracting angle. Then, the angle of incidence will be :

A
$${\sin ^{ - 1}}\left( {\sqrt n } \right)$$
B
$${\cos ^{ - 1}}\left( {\sqrt {{n \over 2}} } \right)$$
C
$${\sin ^{ - 1}}\left( {\sqrt {2n} } \right)$$
D
$$2{\cos ^{ - 1}}\left( {\sqrt {{n \over 2}} } \right)$$
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