Popular Electricity And Magnetism Questions

*Image* A charged capapcitor C1 is discharged through a resisitance R by Putting switch S in position 1 of circuit as shown in the figure. When discharge current reduces to I 0 , the switch is suddenly shifted to position2. C ...

Can we get expression for magnetic field due to a straight current carrying wire:- μi(cos θ1-cosθ2)/4dπ using ampere's law? Please prove... ...

*Image* find the Eq. CAPACITANCE BETWEEN A and B ...

*Image* figure shows 2 large uncharged metal plates kept in a uniform electric field.normal to it.the plates canb thought as to be made of 2 large sheets wid charge density σi nd -σi.now will the induced charge of second pl ...

Find the inducd electric field at a distance x from an infinitely long current carrying a slowly varying current I(t) ...

The space between the plates of a parallel plate capacitor is filled consecutively with two dielectric layers 1 and 2 having the thicknesses d1 and d2 and the permittivities ε1 and ε2 respectively. The area of each plate is ...

1.plz explain, what is the electric flux through each surface in a cube when a point charge is kept at one corner of the cube. mag of charge is q. 2. *Image* each capacitor has capacitance C , find energy drawn from source An ...

A particle of mass 0.195 g carries a charge of -2.50 X 10^- 8 C. The particle is given an initial horizontal velocity that is due north and has magnitude 4.00 X 10^ 4 m/s. What are the magni- tude and direction of the rninirn ...

1.2 straight long conductors of length l1&l3 and wire radii r1 & r2 are bent to form circular coils of turns n1 & n2 respectively.find the ratio of the magnetic induction at their respective centres. a.r2/r1 b.n1r2/n2r1 c.n2l ...

an infinitely long cylindrical surface of circular cross section is uniformly charged lenghtwise with the surface density σ=σocosφ where φ is polar angle of the cylindrical coordinate system whose z axis coincides with th ...

the potential of a certain electrostatic field has the form a. φ= a(x2+y2)+bz2 what shapes have the equipotential surfaces hsve , in the following cases: 1.a>0 b>0 2.a>0 b<0 ? please give an explanation also ! ...

*Image* three identical parallel conducting plates A,B and C are placed as shown . switches are connected to A and C which can connect them to the earth if closed. +q charge is given to B . please consider the following optio ...

how does a SCR(silicon controlled rectifier) work? How is a SCR used in sawtooth wave oscillator ...

p.d = V is applied between 2 coaxial conducting pipes of radii a and b , with b>a. the pipes are made of non magnetic material. a long straight wire current I is fixed along the axis of the 2 pipes. an electron leaves the ...

*Image* the midle plate is earthed ,find the charges on both sidesof each plate ...

*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 ...

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 ...

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 ...

wat is the basic concept of max power generation and relation b/w r shunt n r load ...

*Image* in the given circuit each cell has a internal resistance of 1 ohms. find out the potential difference across the 2 V cell ...

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*Image* A thin ring made of a magnetic material of permeability has a mean diameter d and supports a winding of N turns. The crosssectional area of the ring is equal to S. The ring has a cross-cut of width b such that b < ...