Recent questions in JEE

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Which of the following gives a reversible operation?

asked Dec 17, 2021 in 2020 by Doubtly (98.9k points)

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A polarizer-analyzer set is adjusted such that the intensity of light coming out of the analyzer is just 10 % of the

asked Dec 17, 2021 in 2020 by Doubtly (98.9k points)

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For an ideal gas PT2= constant. Find the coefficient of volume expansion: a.1/T b. 2/T c. 3/T d. 4/T

asked Nov 9, 2021 in Physics by Doubtly (98.9k points)

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1 answer 386 views

A source A produce frequency of horn 1120 Hz. Source and observer are moving towards each other with speeds of 36 km/hr and 72 km/hr respectively.

asked Nov 9, 2021 in Physics by Doubtly (98.9k points)

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1 answer 312 views

Birth, evolution and death of stars etc. are studied in branch of physics known as ............... (a) Thermodynamics (b) Quantum physics

asked Nov 5, 2021 in Physics by Doubtly (98.9k points)

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The range of time scale is about ............... (a) 10–10 sec to1026 sec (b) 10–22 sec to1018 sec (c) 10–15 sec to1015 sec

asked Nov 5, 2021 in Physics by Doubtly (98.9k points)

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The scope for ratio of length is in order to ............... (a) 10–40 (b) 1040 (c) 1020 (d) 1030

asked Nov 5, 2021 in Physics by Doubtly (98.9k points)

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1 answer 171 views

What is the approximate value of the Radius of a nucleus ? (a) 10–14m (b) 10–31m

asked Nov 5, 2021 in Physics by Doubtly (98.9k points)

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1 answer 200 views

Mechanics and Newton's motion laws are ............... laws dependent. (a) liner momentum (b) Energy conservation

asked Nov 5, 2021 in Physics by Doubtly (98.9k points)

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1 answer 166 views

'Physics' comes from a ............... word meaning nature (A) Hindi (B) German (C) Greek (D) Sanskrit

asked Nov 5, 2021 in Physics by Doubtly (98.9k points)

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1 answer 125 views

Physics is one of the basic disciplines in the category of ….. sciences. (A) Astro (B) Natural (C) Space (D) Genetic

asked Nov 5, 2021 in Physics by Doubtly (98.9k points)

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Consider a circular coil of wire carrying current I, forming a magnetic dipole. The magnetic flux through an infinite plane that contains

asked Nov 1, 2021 in Physics by Doubtly (98.9k points)

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Two moles of an ideal gas with Cp/Cv = 5/3 are mixed with 3 moles of another ideal gas with Cp/Cv = 4/3.

asked Nov 1, 2021 in Physics by Doubtly (98.9k points)

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1 answer 138 views

A long solenoid of radius R carries a time (t) dependent current I(t) = I0t(1 − t). A ring of radius 2R is placed coaxially near its middle.

asked Nov 1, 2021 in Physics by Doubtly (98.9k points)

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A 60 HP electric motor lifts an elevator with a maximum total load capacity of 2000 kg. If the frictional force on the elevator is 4000 N,

asked Nov 1, 2021 in Physics by Doubtly (98.9k points)

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1 answer 179 views

A polarizer-analyzer set is adjusted such that the intensity of light coming out of the analyzer is just 10 % of the original intensity.

asked Nov 1, 2021 in Physics by Doubtly (98.9k points)

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0 answers 113 views

The magnitude of vectors OA, OB and OC in the given figure are equal.

asked Oct 30, 2021 in Physics by Doubtly (98.9k points)

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1 answer 542 views

An inductor coil stores 64 J of magnetic field energy and dissipates energy at the rate of 640 W when a current of 8A is passed through it.

asked Oct 30, 2021 in Physics by Doubtly (98.9k points)

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1 answer 371 views

There are 6 batsmen, 7 bowlers and 2 wickets keepers. Find the number of ways of forming

asked Aug 1, 2021 in 2021 by Doubtly (98.9k points)

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If vector a,b,c are three mutually perpendicular vectors equally inclined to vector a + b + c at angle θ, then find the value of 36 cos^2 2θ.

asked Aug 1, 2021 in 2021 by Doubtly (98.9k points)

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