Recently Active Electricity And Magnetism Questions

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2 circular coils A and B with different number of turns are placed at some separation (say d) apart in the same plane. They carry currents I1 and I2 respectively which are maintained. The coefficient of mutual induction for t ...

*Image* A line of charge L=10^-6C/m is fixed on the rim of a wheel of radius R=1m,which is then suspended horizontally,so that it is free to rotate(the spokes are made of wood).In the central region up to radius a=1/2m,there ...

Sir, please help me clear this query of mine. When we say that there is an inductor of inductance 'L', is it supposed to mean the inductance of the inductor at a particular instant is 'L' or does it mean that it is the value ...

A non conducting ring of mass m and radius R has a charge Q distributed over its circumference.It is placed on a rough horizontal surface such that the plane of the ring is parallel to surface.A vertical mag. field B=B0t2is s ...

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A sphere of radius R and surface charge density σ is rotating about an axis passing through its centre with angular velocity ω. Find the magnetic induction at the centre of the sphere. ...

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Two identical charge particles enter a uniform magnetic field with same speed but the at angles 30° and 60° with field . Let a,b and c be the ratio of their time periods ,radii and pitches of the helical paths than (a)abc = ...

*Image* it is an infinite grid.. each segmnt of each resitance is R. all are equal squares.. to find resistance between A nd B ...

Find equivalent resistance between A & B. *Image* ...

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A disc of mass m ,radius R is shown rolling on horz surface(having sufficient friction). Variation of electric fields with direction exist along its path as shown in figure *Image* 1.Find the velocity after very long time. 2. ...

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A small ball is suspended over an infinite horizontal conducting plane by means of an insulating string of stiffness k. As soon as the ball is charged it descends by x and the separation from the plane becomes l. Find the cha ...

In the circuit shown, calculate: a. p.d. between B and D b. current in the galvanometer c. effective resistance across the points A and C *Image* ...

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A hemisphere network of radius a is made by using a conducting wire of resistance per unit length r. Find the equivalent resistance across OP. *Image* ...

In the circuit shown in figure the reading of ammeter is the same with both switches open as with both closed. Then find the resistance R. (ammeter is ideal) *Image* ...

*Image* Find the foce of attraction between the 2 charges??????? ...

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Find equivalent resistance between A and D. *Image* ...

If each resistance of 12Ω then find the equivalent resistance between A and B. *Image* ...

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