Popular Electricity And Magnetism Questions

Suppose a disc of radius a placed on the ground with uniform surface charge density s with its axis vertical.A charged particle is dropped from a height H from the ground along the axis of the disc.Initially the particle is a ...

Simple HCV probs........... 1. A thin, metallic spherical shell contains a charge Q on it. A point charge q is placed at the centre of d shell and another charge q1 is placed outside it as shown in d fig. All d three charges ...

Point charges q and --q are located at the vertices of a square with diagonals 2l as shown . Find the magnitude of the electric field strength at a point located symmetrically with respect to the vertices of the square at a d ...

This question was asked in today's physics boards: "Draw three equipotential surfaces corresponding to a field that uniformly increases in magnitude but remains constant along z - direction. How are these surfaces different f ...

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*Image* a conducting wire is bent in d form of a loop as shown. the segments AOB is parabolic given by the eqn y^2 =2x while segment BA is a straight line parallel to the y-axis. the magnetic field in the region is B= - 8 k^ ...

i have concluded that this pbm cant be solved .if u have solved the pbm please give ur soln.i have seen the soln for this pbm in two buks which was wrong one A parallel capacitor has the space between the plates filled with a ...

There are infinite equipotential lines all parallel to the line AB in a right angled triangular region ABC as shown.All points on the vertical line have the same potential and proportional to the length of the line. *Image* ( ...

last one for today! suppose we are charging a capacitor of capacitance C across a potential difference(battery) of V. Energy stored in capacitor = 1/2 CV2 work done by battery=q.V but q=CV so work done = CV2. where did the re ...

there are 4 concentric shells A,B,C,D, OFradii a,2a,3a,4a resp. shells B & D are given charges +q & -q resp. shell C is now earthed .the potential diff. VA-VC ...

A point-like electric dipole (dipole moment = p) is kept at the origin, pointing along the +z direction. A point charge q having mass m is released at rest from a point on the xy plane at a distance R from the origin. Assumin ...

*Image* the battery of volatge V=10 V .. three capacitors each of 3μF and 5 resistors each of 1Ω are aranged as shown in the fig. arrangement is left for long time so that steady state is reached. then: 1) charge on cap 1 2 ...

A plane divides space into two halves. One half is filled with a homogeneous conducting medium and physicists work in the other. They mark the outline of a square of side a on the plane and let a current I_0 in and out at two ...

Q. A parallel plate capacitor is made of square plates of side length a. A parabolic cylindrical slab of dielectric const. K is placed between the plates . The eq. of the parabola is x2=ay & the vertex of parabola touches the ...

a long horizontal metallic rod with length along the east-west direction is falling under gravity. The potential difference b#w it's 2 ends will a] increase with time b]0 c]constant d]decrease with time ...

Q1. The electric field is given by the expression E=c/x3 where c is a constant. Find the potential at a point P as a function of x. i.e. find V(x) Q2. If there is a cavity in a conductor and no charge is placed in the cavity, ...

I dont know how many times this one has been discussed here.....but the reason for posting here is that I just found 2 good solns to this one..... Find resistance b/w A and B *Image* Lets see who posts all 3.... Start with th ...

a half wave rectifier is being used to rectify an alternating voltage of freqncy 50Hz d no of pulses of rectified currt obtained in one sec is 50 25 100 200 fromula ke saath answer do ...

True or false: An electric line of force( i.e electric field) in the x-y plane is given by the equation x2 +y 2 =1 . A particle with unit positive charge, initially at rest at (1,0) in the xyplane, will move along the line of ...

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Consider two solid spheres A and B made up of a linear and homogeneous dielectric, each having a radius a . Their centers are separated by a distance r\gg a . The sphere A carry a charge +q while B is neutral. Now if all the ...

is magnetic force conservative ????????? ...

*Image* Find the current through 1 ohm resistor : ...

if u know this it is easy but if u dont know, its worth knowing.... Q) a spherical ball of radius R is uniformly charged with charge density ρ .determine the electrostatic energy of the sphere. ...

plz can someone explain me how the charges are distributed in conductors placed side by side . i know i am going wrong somewhere but yet not able to understand . sample question 3 conductors- A B C +Q 0 -2Q Find final charge ...

*Image* Charge density is different but uniform on both sides of hemisphere. Find the force exerted on lower by the upper hemisphere. I need the approach. I have the answer ...

tank circuit ................................................................................ Let me see if u can calculate this.. What is the total impedence of a tank circuit . ...

Two point charges P1and P2 are moving along positive x-axis. Charge and mass of P1 and P2 are (2uc,60ug)and (-5uc,30ug). At particular instant , if the distance of separation is 9mm and the respective speeds are 400ms-1and 13 ...

what will happen to a person sitting in a stationary car if lightning strikes the car... ...