Questions by Doubtly

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Three gases O2, N2 and Co2 having masses 16g, 28g and 44g respectively are filled in a container of volume V

asked Mar 30, 2021 in Physics

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1 answer 779 views

Four small balls are placed at the corner of a square of length l. Evaluate MOI of system about a line passing through A and parallel to BD.

asked Mar 30, 2021 in Physics

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1 answer 343 views

In photoelectric effect stopping potential for electromagnetic radiations depends on

asked Mar 30, 2021 in Physics

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1 answer 985 views

A simple pendulum attached to ceiling of lift has time period T when lift is at rest.

asked Mar 30, 2021 in Physics

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1 answer 890 views

Relation between voltage, current and resistance is given by R=V/I Measured value of voltage (50 ±2) volt, measured value of current is (20 ±2)A.

asked Mar 30, 2021 in Physics

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1 answer 381 views

Relation between energy density of electric field (UE) and magnetic field (UB) will be:

asked Mar 30, 2021 in Physics

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1 answer 623 views

A common transistor radio set requires 12V (D.C.) for its operation. The D.C. source is constructed by using a transformer

asked Mar 29, 2021 in Physics

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1 answer 877 views

The coefficient of static friction between a wooden block of mass 0.5 kg and a vertical rough wall is 0.2.

asked Mar 29, 2021 in Physics

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1 answer 1.2k views

An audio signal υm = 20sin2π(1500t) amplitude modulates a carrier υc =80 sin 2π (100,000t). The value of percent modulation is ________.

asked Mar 29, 2021 in Uncategorized

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1 answer 630 views

A resonance circuit having inductance and resistance 2 × 10–4 H and 6.28 Ω respectively oscillates at 10 MHz frequency.

asked Mar 29, 2021 in Physics

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1 answer 1.2k views

Each side of a box made of metal sheet in cubic shape is ‘a’ at room temperature ‘T’, the coefficient of linear expansion of the metal sheet is ‘α’.

asked Mar 29, 2021 in Physics

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1 answer 3.1k views

The work done by a gas molecule in an isolated system is given by, W = α.β2.e-x2 / αkT, where x is the displacement, k is the Boltzmann constant and T is the

asked Mar 29, 2021 in Physics

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1 answer 878 views

The focal length f is related to the radius of curvature r of the spherical convex mirror by:

asked Mar 29, 2021 in Physics

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1 answer 942 views

A current through a wire depends on time as i = α0t + βt2 where α0 = 20 A/s and β = 8 As-2. Find the charge crossed through a section of the wire in 15 s.

asked Mar 29, 2021 in Physics

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1 answer 392 views

Statement-I: Two photons having equal linear momenta have equal wavelengths. Statement-II: If the wavelength of a photon is decreased,

asked Mar 29, 2021 in Physics

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1 answer 474 views

Consider two satellites S1 and S2 with periods of revolution 1 hr and 8 hr respectively revolving around a planet in circular orbits.

asked Mar 29, 2021 in Physics

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1 answer 962 views

Four identical particles of equal masses 1 kg made to move along the circumference of a circle of radius 1 m under the action of their own mutual gravitational

asked Mar 29, 2021 in Physics

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1 answer 475 views

The integral int (2x^12+5x^9 /(x^5+x^3+x)^3) dx is equal to

asked Mar 28, 2021 in Uncategorized

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1 answer 708 views

A gas contained in a cylinder fitted with a frictionless piston expands against a constant external pressure of 1 atm from

asked Mar 28, 2021 in Chapter1:Rotational Dynamics

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1 answer 415 views

How many chain isomers are possible in C5H12 , answer

asked Mar 27, 2021 in random

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