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General
Easy
Question
How long will it take sound waves to travel the distance l between the points A and B if the air temperature between them varies linearly from T1 to T2? The velocity of sound propagation in air is equal to 
, where α is constant
The correct answer is:
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Figure shows lines of force for a system of two point charges The possible choice for the charges is q1 q2
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Figure shows the electric lines of force emerging from a charged body. If the electric field at ‘A’ and ‘B’ are EA and EB respectively and if the displacement between ‘A’ and ‘B’ is ‘r’ then A B
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Four charges are arranged at the corners of a square ABCD as shown in the figure. The force on the positive charge kept at the centre ‘O’ is
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The charges Q, +q and +q are placed at the vertices of a right angle triangle (isosceles triangle). The net electrostatic energy of the configuration is zero, if Q is equal to....
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An electron of mass me, initially at rest, moves through a certain distance in a uniform electric field in time t1.A proton of mass mp , also initially at rest, takes time t2 to move through an equal distance in this uniform electric field. Neglecting the effect of gravity, the ratio 
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Charges Q, 2Q and 4Q are uniformly distributed in three dielectric solid spheres 1,2 and 3 of radii null , R and 2R respectively. If magnitudes of the electric fields at point P at a distance R from the centre of spheres 1,2 and 3 are E1 , E2 and E3 respectively then,
Charges Q, 2Q and 4Q are uniformly distributed in three dielectric solid spheres 1,2 and 3 of radii null , R and 2R respectively. If magnitudes of the electric fields at point P at a distance R from the centre of spheres 1,2 and 3 are E1 , E2 and E3 respectively then,
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Find the potential at a point due to negative charge of 200 mC at a distance of 3m.
Find the potential at a point due to negative charge of 200 mC at a distance of 3m.
Physics-General
