1
JEE Main 2022 (Online) 24th June Morning Shift
MCQ (Single Correct Answer)
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Two metallic blocks M1 and M2 of same area of cross-section are connected to each other (as shown in figure). If the thermal conductivity of M2 is K then the thermal conductivity of M1 will be :

[Assume steady state heat conduction]

JEE Main 2022 (Online) 24th June Morning Shift Physics - Heat and Thermodynamics Question 176 English

A
10 K
B
8 K
C
12.5 K
D
2 K
2
JEE Main 2022 (Online) 24th June Morning Shift
Numerical
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0.056 kg of Nitrogen is enclosed in a vessel at a temperature of 127$$^\circ$$C. Th amount of heat required to double the speed of its molecules is ____________ k cal.

Take R = 2 cal mole$$-$$1 K$$-$$1)

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3
JEE Main 2022 (Online) 24th June Morning Shift
Numerical
+4
-1
Change Language

Two identical thin biconvex lens of focal length 15 cm and refractive index 1.5 are in contact with each other. The space between the lenses is filled with a liquid of refractive index 1.25. The focal length of the combination is __________ cm.

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4
JEE Main 2022 (Online) 24th June Morning Shift
Numerical
+4
-1
Change Language

As shown in the figure an inductor of inductance 200 mH is connected to an AC source of emf 220 V and frequency 50 Hz. The instantaneous voltage of the source is 0 V when the peak value of current is $${{\sqrt a } \over \pi }$$ A. The value of $$a$$ is ___________.

JEE Main 2022 (Online) 24th June Morning Shift Physics - Alternating Current Question 79 English

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