Recently Active Electricity And Magnetism Questions

A co-axial cable is made up of two conductors. The inner conductor is solid and is of radius R1 and the outer conductor is hollow of inner radius R2 and outer radius R3. The space between the conductors is filled with air.The ...

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Question. Consider a solid sphere of radius r and mass m which has charge q distributed uniformly over its volume.The sphere is rotated about a diameter with an angular speed x . Show that the magnetic moment y and the angula ...

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while doing a sum the emf of a battery in a circuit came out to be negative.surprisingly the answer was negative.how is it possible.how is the current flowing then?? ...

A wire of length 60cm and mass 16gm is suspended by a pair of flexible leads an a magnetic field of induction 0.6 weber/metre2 as shown. What is the magnitude and direction of the current required to remove the tension in the ...

A point charge Q is placed at x=k on the x-axis, k>1. There's a conducting sphere at the origin, of radius 1 unit. Find the field at the origin due to induced charges. ...

*Image* the cell is ideal. what is th PD across the capacitor?? pleaxe xplain. ...

*Image* each side has R resi. this sys. will last till infinite series ? ...

Ex=0 and Ey=k y in a 2dimensional plane map the electric field lines. ...

*Image* what is the current flowing in G? PD across 5F capacitor.... PD across 4F capacitor... ...

Does Gauss law for electric flux hold, in case of induced electric field due to time dependent magnetic field in a cylindrical region? Is it the case that Gauss law for flux holds in conservative electric fields only??? a bit ...

*Image* Doubt is that must E always be greater than vBl Although it has mentioned v is small, but B and l may be large enuf to be greater than E, So the answers will differ. IS my logic correct? ...

*Image* the orange dot is the center of the cube and its the origin the charge is at the point (2a,0,2a) ...

the sum is there is a point charge of +2.4 micro C located at the origion..... find the work done in displacing a 2nd pnt charge of q=4.30micro C from x=0.150 y=0 to x=0.250 to y=0.250 my doubt is that we can first easily sov ...

yesterday i was seeing the sove papers of nsep and i saw that the equivalent resistance m was asked in one question and it was writtent that equivalent reisstance is when calculated the internal resistance is not added.... is ...

*Image* pls solve fast the logic whci i was getting was that the magnetic field will be the diffrence between the rod between pnt A and the perpendicular meeting pnt and the b to the perpendicular meeting pn ...

A positive point charge Q is kept (as shown in the figure) inside a neutral conducting shell whose centre is at C. An external uniform electric field E is applied. Then which of the followings is/are incorrect: *Image* force ...

find the equivalent time constant of the circuit obviusly there is one long method the kirchoffs law method but is there a simpler method and one more question is that find the current in the circuit after steady state this p ...

Two concentric shells are surrounded by a conducting surface as shown in figure. Now the middle shell and outer conducting surface are connected by a conducting wire. What will be charge on surface surrounding the two shells ...

*Image* PLZ IGNORE THE DATA WRITTEN WITH PEN AND THE LINE SHOWING '50' ON ONE CAPACITOR AND ALSO THE OTHER LINE ON THE OTHER CAPACITOR. SOLVE THE QUESTION WITH ONLY THE PRINTED INFO C1=1 F C2= 2F L=5H initially C1 is charged ...

i dont know but i hv this doubt nagging me....... we hv studed that according to gauss law magnetic flux through a closed surface is 0 as no single charge ever exists..... now in electromagentic inudctuion the emf induced is ...

i dont know but i hv this doubt nagging me....... we hv studed that according to gauss law magnetic flux through a closed surface is 0 as no single charge ever exists..... now in electromagentic inudctuion the emf induced is ...

as we hv learnt that field outside a solenoid is 0 but here *Image* but here in ncert it is calculating the elctric field at a pnt p successfully so i htink i hv made a mistake the field along the axis of a solenoid is not 0 ...

*Image* the two extreme plates are grounded .........A and B given charge 2Q and 3Q .......find potential difference between A and B .... ...

This is my doubt....framed this question myself will the battery supply charge in the circuit or will it be dead????? *Image* ...

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thin infinite sheet of width w contains uniform charge distribution \sigma find out the electric field at the ponit which is on the symmetry plane of the plane of sheet at a perpendicular distance d from it ...

a conducting wire frame is paced in a magnetic fied ,which is directed into the paper.the magnetic field is increasing at a contant rate.the direction of induced currents in the wires AB and CD are *Image* a) A to B and C to ...