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JEE Mains 2019 physics questions with solutions
Browse JEE Mains 2019 Physics questions with solutions. Useful for JEE, NEET, and school exam revision.
Showing 1–10 of 64 questions
- MCQmediumMagnetic effect of current
A paramagnetic material has 10²⁸ atoms/m³. Its magnetic susceptibility at temperature 350 K is 2.8 ×10⁻⁴. Its susceptibility at 300 K is :
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JEE Mains 2019
Open question & full solution → - MCQmediumNewtons law of motion and Friction
Blocks A and B of masses 1 kg and 3 kg are stacked on a table. The coefficient of friction between A and B and between B and table is 0.2. A horizontal force F is applied to B. Find the maximum F for which A does not slide over B. Take g = 10 m s⁻².
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JEE Mains 2019
Open question & full solution → - MCQmediumMagnetic effect of current
A galvanometer having a resistance of 20 Ω and 30 divisions on both sides has figure of merit 0.005 ampere/division. The resistance that should be connected in series such that it can be used as a voltmeter upto 15 volt, is :-
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Open question & full solution → - MCQmediumWave Optics
In a double-slit experiment, green light (5303 Å) falls on a double slit having a separation of 19.44 μm and a width of 4.05 μm. The number of bright fringes between the first and the second diffraction minima is:
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Open question & full solution → - MCQmediumMagnetic effect of current
A particle of mass m and charge q is in an electric and magnetic field given by E⃗ = 2î + 3ĵ ; B⃗ = 4ĵ + 6k̂ The charged particle is shifted from the origin to the point P(x = 1 ; y = 1) along a straight path. The magnitude of the total work done is :-
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Open question & full solution → - MCQmediumAC Circuits
A 10 cm conducting strip lies on a U-shaped wire and is attached to a spring of spring constant 0.5 N m⁻¹. The system is in a uniform magnetic field 0.1 T as shown. If the strip is displaced and released, the number of oscillations before its amplitude falls by a factor e is closest to:
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Open question & full solution → - MCQmediumRotational Motion
An equilateral triangle ABC is cut from a thin solid sheet of wood. (see figure) D, E and F are the mid-points of its sides as shown and G is the centre of the triangle. The moment of inertia of the triangle about an axis passing through G and perpendicular to the plane of the triangle is I₀. If the smaller triangle DEF is removed from ABC, the moment of inertia of the remaining figure about the same axis is I. Then:
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Open question & full solution → - MCQmediumMagnetic effect of current
Two magnetic dipoles X and Y are placed at a separation d, with their axes perpendicular to each other. The dipole moment of Y is twice that of X. A particle of charge q is passing, through their midpoint P, at angle θ = 45° with the horizontal line, as shown in figure. What would be the magnitude of force on the particle at that instant ? (d is much larger than the dimensions of the dipole)
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Open question & full solution → - MCQmediumElectromagnetic wave
The magnetic field of an electromagnetic wave is B⃗=1.6×10⁻⁶ cos(2×10⁷z+6×10¹⁵t)(2î+ĵ) T. Which expression gives the associated electric field?
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Open question & full solution → - MCQeasyWave Motion
A person standing on an open ground hears the sound of a jet Aeroplane, coming from north at an angle 60° with ground level. But he finds the Aeroplane right vertically above his position. If v is the speed of sound, speed of the plane is:
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