Recent questions in JEE

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The mean of 6 numbers is 6.5 and its variance is 10.25. If 4 numbers are 2,4,5 and 7, then find the other two.

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

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1 answer 1.2k views

The initial velocity vi required to project a body vertically upward from the surface of the earth to reach a height of 10R, where R is the radius of the earth,

asked Jul 24, 2021 in Physics by Doubtly (98.9k points)

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The radius in kilometer to which the present radius of earth (R = 6400 km)

asked Jul 24, 2021 in Physics by Doubtly (98.9k points)

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1 answer 416 views

which of the following is most easily economically refined by fractional distillation

asked Jul 20, 2021 in 2021 by Doubtly (98.9k points)

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1 answer 524 views

If P4O10 + HNO3 are mixed in 1:4 ratio , then nature of nitrogen oxide obtained will be

asked Jul 20, 2021 in 2021 by Doubtly (98.9k points)

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Benzene has vapor pressure of 70 torr and methyl benzene has 20 torr .

asked Jul 20, 2021 in 2021 by Doubtly (98.9k points)

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In △ABC , cos B= 3/5 , AB=5 and R=5 . find the area of △ABC

asked Jul 20, 2021 in 2021 by Doubtly (98.9k points)

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1 answer 1.0k views

find the coefficient of x^256 in [1-x]^101 x (x^2+x+1)^100

asked Jul 20, 2021 in 2021 by Doubtly (98.9k points)

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1 answer 576 views

tangent and normal are drawn to y^2=2x at A(2,2). tangent cuts x-axix at T and normal cuts parabola again at P

asked Jul 20, 2021 in 2021 by Doubtly (98.9k points)

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1 answer 308 views

Bird is flying in northeast direction with v 4rt^2 wind from north to south with 1m/s find the

asked Jul 20, 2021 in 2021 by Doubtly (98.9k points)

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1 answer 252 views

The period of oscillation of a simple pendulum is T = 2π\sqrt{Lg}. Measured value of 'L' is 1.0 m from meter

asked Jul 15, 2021 in Physics by Doubtly (98.9k points)

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1 answer 645 views

A student measured the length of a rod and wrote it as 3.50 cm. Which instrument did he use to measure it?

asked Jun 14, 2021 in Physics by Doubtly (98.9k points)

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1 answer 299 views

Let E0 denote the dimensional formula of the permittivity of vacuum. If M = mass, L = length, T = time and A = electric current, then:

asked Jun 14, 2021 in Physics by Doubtly (98.9k points)

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1 answer 559 views

Resistance of a given wire is obtained by measuring the current flowing in it and the voltage difference applied across it. If the percentage

asked Jun 14, 2021 in Physics by Doubtly (98.9k points)

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The respective number of significant figures for the numbers 23.023, 0.0003 and 2.1 10–3 are

asked Jun 14, 2021 in Physics by Doubtly (98.9k points)

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1 answer 356 views

A body of mass m = 3.513 kg is moving along the x-axis with a speed of 5.00 ms−1. The magnitude of its momentum is recorded as

asked Jun 14, 2021 in Physics by Doubtly (98.9k points)

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1 answer 302 views

The dimension of magnetic field in M, L, T and C (coulomb) is given as

asked Jun 14, 2021 in Physics by Doubtly (98.9k points)

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1 answer 388 views

Out of the following pair, which one does NOT have identical dimensions is A angular momentum and Planck's constant

asked Jun 14, 2021 in Physics by Doubtly (98.9k points)

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1 answer 321 views

Which one of the following represents the correct dimensions of the coefficient of viscosity?

asked Jun 14, 2021 in Physics by Doubtly (98.9k points)

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1 answer 319 views

The physical quantities not having same dimensions are torque and work

asked Jun 14, 2021 in Physics by Doubtly (98.9k points)

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