Recently Active Electricity And Magnetism Questions

Four particles each having a charge q, are placed on the four vertices of a regular pentagon. The distance of each corner from the centre is a. Find the electric field at the centre of the pentagon.. ANS is q/(4πεa2) plz gi ...

*Image* find the potential energy of point charge q1 ...

In a series LCR circuit ,current=11A when applied voltage=220V.Voltage across unknown capacitor=220V.If value of resistor=20 ohm then voltage across unknown conductor is_____ ...

metal plates form a paralel plate capacitor maintained @ certain pd. when 3 mm thick slab is introduced bw plates inorder 2 maintain sm pd , distance bw plates is increasedd by 2.4 mm. wat is dielectric const of medium >&g ...

A charged particle have a charge q enters a region in which there is a friction force which is proportional to the speed of particle. THe constant of proportionality of friction force is b. The particle stops traveling a dist ...

a long round conductor of cross sectional area A is made of material whose resistivity depends on radial distance r from the axis of conductor as p=a/r^2 , a is contant What is total resistance per unit length of conductor an ...

Two non conducting hemispheres having uniform equal and opposite charge those two halves are joined to make a sphere and kept in uniform electric field the diameter makes an angle θ with horizontal the ground has sufficient ...

if a charged partical goes unaccelerated in a region containing electric and magnetic field then what are the conditions for it ...

in the RC circuits in order to calculate time constant the resistance we are to take is the resistance of the branch in which capacitor is there or the net resistance of the circuit or something else? Also please reply the pr ...

Why current in a ckt flows very fast though electron travel with drift velocity of few centimeters per second? Like if it is a very long wire, will switching on the circuit immediately take the current to the other end? why? ...

two circular rings A and B , each of radius a=130 cm are placed co-axially with their axes horizontal in a uniform electric field E=10^5 N/C directed vertically upwards distance between the centers of these rings A and B is h ...

two resistors of temperature coefficient of resistance a1 and a2 have resistance R01 and R02 at 0 degreeC find the net value of temperature coefficient a when the two resistances are in parallel ...

For a Shell with inner radius r, outer radius R with a charge Q(+ve) at the centre, what is the expression for its "Self-Energy" and Potential Energy??? ...

Two Uniformly Charged Rings are placed co-axially, at a seperation d, one with +Q and the other with -Q, then find the value of electric field at a point on the axis, as a function of x, where x is the ditsnce frm the ring ch ...

what is the work done in taking a charge from one point to another between the plates of a capacitor? The electric field due to a charged sheet at a particular point(σ/2ε0) does not depend upon the distance between the plat ...

Electric Potential of earth is zero because earth is a good- 1)semiconductor 2)conductor 3)insulator 4)dielectric pls explain also ...

a battery with external resistance R with galvanometer in series are connected to form a circuit Across the galvanometer another external resistance 40ohm is connected in parallel through an open key K if key K is pressed the ...

an electron is moving along positive X- axis You want to apply a magnetic field for a short time so that the electron mayn reverse its direction and move parallel to the negative X- axis this can be done by applying the magne ...

a battery with external resistance R with galvanometer in series are connected to form a circuit Across the galvanometer another external resistance 40ohm is connected in parallel through an open key K if key K is pressed the ...

in a circuit there are two resistances each R in series Across any one R there is resistance 2R in parallel The arrangement is connected to a source The charge supplied by source varies with time t as Q=at-bt^2 what is the to ...

when a current passes through a resistor its temperature increases is it an adiabatic process ...

apply first law of thermodynamics to a resistor carrying a current i identify which of the quantities dQ , dU , dW are zero which are positive and which are negative ...