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

An observer moves towards a stationary source of sound with a velocity equal to one-fifth of the velocity of sound. The percentage change in the frequency will be :

A
20%
B
10%
C
5%
D
0%
2
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
$$2{\cos ^{ - 1}}\left( {\sqrt {{n \over 2}} } \right)$$
3
JEE Main 2022 (Online) 27th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A hydrogen atom in its ground state absorbs 10.2 eV of energy. The angular momentum of electron of the hydrogen atom will increase by the value of :

(Given, Planck's constant = 6.6 $$\times$$ 10$$-$$34 Js).

A
2.10 $$\times$$ 10$$-$$34 Js
B
1.05 $$\times$$ 10$$-$$34 Js
C
3.15 $$\times$$ 10$$-$$34 Js
D
4.2 $$\times$$ 10$$-$$34 Js
4
JEE Main 2022 (Online) 27th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Identify the correct Logic Gate for the following output (Y) of two inputs A and B.

JEE Main 2022 (Online) 27th June Morning Shift Physics - Semiconductor Question 57 English

A
JEE Main 2022 (Online) 27th June Morning Shift Physics - Semiconductor Question 57 English Option 1
B
JEE Main 2022 (Online) 27th June Morning Shift Physics - Semiconductor Question 57 English Option 2
C
JEE Main 2022 (Online) 27th June Morning Shift Physics - Semiconductor Question 57 English Option 3
D
JEE Main 2022 (Online) 27th June Morning Shift Physics - Semiconductor Question 57 English Option 4
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