Recently Active Electricity And Magnetism Questions

*Image* C1 is 2pF C2 is 3pF V1 is 30V V2 is 20V What will be the potential difference of both capacitor when (i) S1 is closed (ii) S3 is closed (iii) S1 & S2 is closed (iv) S1 & S3 is closed ...

how to find time constant for RC circuit consisting of more than one resistance and capacitance ...

*Image* mujhe kuch ni samah ra ...

*Image* m gettin sum diffrnt answers n d answers given r diffrnt ...

a parallel combination of 0.1 M Ω resistor and a 10μF capacitor is connected across 1.5 V source of negligible resistance . the time required for the capacitor to get charged upto 0.75 V will be ???????????????????????????? ...

assertion : a paralell plate air cap is charged using a batry and a diectric slab is then inserted in d whole space betwn itz plate widout disconentcing d battry consequntly d charge on d cap increases bt d elctric field stre ...

electricity................................................................................. let me add some spice in your life .. what kind of circuit model is also known as SPICE . ...

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*Image* A spherical portion has been removed from a solid sphere having a charge distributed uniformly in its volume as shown in the figure. The electric field inside the emptied space is (A) zero everywhere (B) non-zero and ...

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 ...

An electron is at rest in a region having uniform & constant magnetic field.The magnitude of the magnetic field is suddenly doubled keeping its direction same.After the sudden change,the magnetuc field is again uniform & cons ...

An inductor having self inductance L wit hcoil resistance R is connected across battery of emf E. Circuit is in steady state at t=0.At that instant a rod is inserted in inductor due to which inductance becomes nL where n>1 ...

A charge +Q is fixed at the origin. Far away from it an electric dipole of dipole moment P pointing away from the origin is released from rest. The length of the dipole is negligible. Find i) the kintetic energy of the dipole ...

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A non conducting ring has linear charge density λ match the following a)λ=λ0 1)Electric field at the centre of the ring is in direction of -j b)λ=λ0 cosθ ;0≤θ≤2π 2)Electric field at centre of ring is zero c)λ=λ0 ...

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 ...

ARRE......... MUJHE TO QUESTION HI SAMAJH NAHI AAYA [2] *Image* ...

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* ( ...

*Image* P,Q,R & S lie at the edges of a SQUARE OF side A..8 WIRES OF SAME resisstance per unit length μ are connected as shown...A time varying magnetic field(inside the plane of the page) B=B0t exists in space.Then current ...

Point charges q and -q are kept at the alternate corners of a cube of side a. Write the expression for the work done in removing all the charges far away from each other *Image* ...

A non conducting disc of radius a and uniform positive surface charge density σ is placed on the ground with its axis vertical. A particle of mass m and +ve charge q is dropped along the axis of the disc from a height H with ...

EK AUR DBT FRM 2007 PAPER 2!!! PL. SEE *Image* 2) two pt. charges onne +ve and other -ve OF same magnitude are placed at (0,0,a/2) and (0,0,-a/2) respectively. Find work done by the electric field wen another +ve pt. charge i ...

Three concentric metallic shells A,B, C of radius a,b,c a< b <c have surface chrge densities of σ,-σ, σ respectively Find the potential of the three shells A,B, C if shell A and C have the same potential then find th ...

*Image* if radius is R and resistance per unit lengthis r,then equivalent resistance across PQ is ______ (give explanations) ...

a straight copper wire or a circular copper loop carrying a constant current will it produce electic field and experience electric force a circular loop carrying a uniform density of charge will it produce magnetic field in t ...

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*Image* *Image* *Image* IN THE CIRCUIT SHOWN BELOW Va AND Vb be the potentials at A and B , R is the equivalent resistence between A and B , S1 and S2 are switches and DIODES are ideal *Image* *Image* ...

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A tiny electric dipole of dipole moment p is placed at a distance r from an infinitely long wire , with it's p normal to the wire. If the linear charge density of the wire is λ , the electrostatic force acting on the dipole ...