1
JEE Main 2021 (Online) 22th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Match List - I with List - II

List - I List - II
(a) $$\omega L > {1 \over {\omega C}}$$ (i) Current is in phase with emf
(b) $$\omega L = {1 \over {\omega C}}$$ (ii) Current lags behind the applied emf
(c) $$\omega L < {1 \over {\omega C}}$$ (iii) Maximum current occurs
(d) Resonant frequency (iv) Current leads the emf


Choose the correct answer from the options given below
A
a(ii), b(i), c(iv), d(iii)
B
a(ii), b(i), c(iii), d(iv)
C
a(iii), b(i), c(iv), d(ii)
D
a(iv), b(iii), c(ii), d(i)
2
JEE Main 2021 (Online) 22th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
A ray of light passes from a denser medium to a rarer medium at an angle of incidence i. The reflected and refracted rays make an angle of 90$$^\circ$$ with each other. The angle of reflection and refraction are respectively r and r'. The critical angle is given by

JEE Main 2021 (Online) 22th July Evening Shift Physics - Geometrical Optics Question 96 English
A
sin$$-$$1 (tan r)
B
sin$$-$$1 (cot r)
C
sin$$-$$1 (tan r')
D
tan$$-$$1 (sin i)
3
JEE Main 2021 (Online) 22th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
An electron of mass me and a proton of mass mp are accelerated through the same potential difference. The ratio of the de-Broglie wavelength associated with the electron to that with the proton is
A
$${{{m_e}} \over {{m_p}}}$$
B
1
C
$${{{m_p}} \over {{m_e}}}$$
D
$$\sqrt {{{{m_p}} \over {{m_e}}}} $$
4
JEE Main 2021 (Online) 22th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
What will be the average value of energy for a monoatomic gas in thermal equilibrium at temperature T?
A
$${3 \over 2}{k_B}T$$
B
$${k_B}T$$
C
$${2 \over 3}{k_B}T$$
D
$${1 \over 2}{k_B}T$$
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