Recently Active Electricity And Magnetism Questions

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*Image* find the equivalent capacitance between A and C. ...

Capacitor C is charged to a potential V and the battery is disconnected. now if the plates are brought close slowly by some distance: a) some +ve work is done by external agent b) energy of capacitor will decrease c) energy o ...

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why is electricity produced when lightening occurs? ...

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Switch is closed at t=0.Initially no current in inductor. Find out current in inductor as function of time *Image* ...

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A capacitor of capacitance C is charged by a battery of EMF E and internal resistance r. A resistance of 2r is also connected in series with the capacitor. The amount of heat liberated inside the battery by the time capacitor ...

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While deriving an expression for resultant capacitance or resistance in a parallel combination, how do we reach to the conclusion that potential difference across each capacitor is same?? ...

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A rod of mass 0.02 Kg and length 2m is sliding down on an conducting rails inclined at an angle 30° by the action of a variable force which is acting on the rod down the inclined. If rod was initially at rest, i=0, di/dt = 5 ...

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Large number of capacitors of rating 10 microfarad/200 V are available. The minimum number of capacitors required to design a 10 microfarad/700V capacitor is: (a)16 (b)4 (c)8 (d)7 ...

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In a series L–R growth circuit, if maximum current and maximum induced emf in an inductor of inductance 3mH are 2A and 6V respectively, then the time constant of the circuit is ...