Recent questions tagged physics

by JeeNeetQnA in Wave Optics asked Mar 1 169 views

If intensity after passing through a polaroid is 100 Lumen. Now this same polaroid is rotated by 30° about it's axis

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by JeeNeetQnA in Thermal Properties of Matter asked Mar 1 15 views

A side of cube a is made from 6 identical sheet. If coefficient of linear expansion is α and temperature is now made

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by JeeNeetQnA in Physics and Measurement asked Mar 1 15 views

If work = α⋅β^2⋅e^−x2α⋅KT, where, K = Boltzmann constant, T = temp, then find dimension of β

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by JeeNeetQnA in Properties of Solids and Liquids asked Mar 1 6 views

Find relation between modulus, If Y → young's modulus, K → Bulk modulus, η → modulus of rigidity

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by JeeNeetQnA in Electronic Devices asked Mar 1 31 views

In a transistor if increase in emitter current is 4 mA and corresponding increase in collector current is 3.5 mA. Find β

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by JeeNeetQnA in Electrostatics asked Mar 1 10 views

If two identical capacitor once connected in series (Ceq = C1) and once connected in parallel (Ceq = C2) then find ratio

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by JeeNeetQnA in Electrostatics asked Feb 9 32 views

A charge Q is distributed over two concentric conducting thin spherical shells radii r and R (R > r).

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by JeeNeetQnA in Physics asked Feb 9 47 views

In the following, digital circuit, what will be the output a 'Z', when the input (A,B) are (1,0), (0,0), (1,1), (0,1)

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by JeeNeetQnA in Oscillations and Waves asked Feb 8 37 views

The displacement time graph of a particle executing SHM is given in figure : (sketch is schematic and not to scale)

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by JeeNeetQnA in Current Electricity asked Feb 8 49 views

A potentiometer wire PQ of 1m length is connected to a standard cell E1. Another cell E2 of emf 1.02 V is connected

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by JeeNeetQnA in Magnetic Effects of Current and Magnetism asked Feb 8 27 views

The figure shows a region of length '$\ell$' with a uniform magnetic field of 0.3 T in it and a proton entering

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by JeeNeetQnA in Kinematics asked Feb 4 77 views

A person sitting in the ground floor of a building notices through the window, of height 1.5 m, a ball dropped

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by JeeNeetQnA in Dual Nature of Matter and Radiation asked Feb 4 11 views

The wave nature of electrons was experimentally verified by :

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by JeeNeetQnA in Oscillations and Waves asked Feb 4 16 views

Identify the function which represents a periodic motion.

Identify the function which represents a periodic motion. (1) e–ωt (2) eωt (3) loge(ωt) (4) sinωt + cosωt

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by JeeNeetQnA in Electronic Devices asked Feb 4 15 views

Which of the following gate is called universal gate ?

Which of the following gate is called universal gate ? (1) NOT gate (2) OR gate (3) AND gate (4) NAND gate

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by JeeNeetQnA in Electrostatics asked Feb 4 23 views

The variation of electrostatic potential with radial distance r from the centre of a positively charged metallic

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by JeeNeetQnA in Ray Optics and Optical Instruments asked Feb 4 9 views

The power of a biconvex lens is 10 dioptre and the radius of curvature of each surface is 10 cm.

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by JeeNeetQnA in Electrostatics asked Feb 4 192 views

A parallel plate capacitor having cross-sectional area A and separation d has air in between the plates.

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by JeeNeetQnA in Ray Optics and Optical Instruments asked Feb 4 94 views

A plano-convex lens of unknown material and unknown focal length is given. With the help of a spherometer

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by JeeNeetQnA in Rotational Motion asked Feb 4 23 views

A point mass 'm' is moved in a vertical circle of radius 'r' with the help of a string. The velocity of the mass is √7gr

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by JeeNeetQnA in Laws of Motion asked Feb 4 16 views

Calculate the acceleration of the block and trolly system shown in the figure. The coefficient of kinetic friction

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by JeeNeetQnA in Ray Optics and Optical Instruments asked Feb 4 12 views

If the critical angle for total internal reflection from a medium to vacuum is 45°, then velocity of light

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by JeeNeetQnA in Atoms and Nuclei asked Feb 4 20 views

What happens to the mass number and atomic number of an element when it emits γ-radiation?

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by JeeNeetQnA in Electrostatics asked Feb 4 15 views

The acceleration of an electron due to the mutual attraction between the electron and a proton when they are 1.6 Å

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by JeeNeetQnA in Rotational Motion asked Feb 4 25 views

The angular speed of the wheel of a vehicle is increased from 360 rpm to 1200 rpm in 14 second.

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by JeeNeetQnA in Ray Optics and Optical Instruments asked Feb 4 26 views

An object is placed on the principal axis of a concave mirror at a distance of 1.5 f (f is the focal length).

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by JeeNeetQnA in Current Electricity asked Feb 4 128 views

An ideal cell of emf 10V is connected in circuit shown in figure. Each resistance is 2Ω. The potential difference (in V)

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