Recently Active Electricity And Magnetism Questions

1. *Image* Va=?a.2V b.0V c.-2V d.0.5V . 3. *Image* the ratio of resistance accross AB with switch open&closed is a.1:3 b.3:1 c.1:1 d.1:2 ...

A very long uniformly charged theread oriented along the axis of a circle of radius R rests on its centre with one of the ends. The charge of the thread per unit lengt is equal to λ. Find the flux of the vector E across the ...

a charged sphere A of radius r is placed concentrically inside a conducting spherical shell(B) of radius R (R>r). A charge Q is given to A and then A and B are joined by a metal wire the charge flowing from A to B will be ...

a particle havin +ve chrge is releasd frm rest in eltric field and moves under d influence of both d eltric field n gravity .wich of d follwon qunatites conncted wid d chrged particle continously increases wid tym Eltric pote ...

A working transistor with its three legs marked P, Q and R is tested using a multimeter. No conduction is found between P and Q. By connecting the common (negative) terminal of the multimeter to R and the other (positive) ter ...

d depletion layer in pn junction is caused by drift of holes drift of eltrons diffusion of charge carriers migration of impurities ...

*Image* A charged particle (mass m) is hanging from a point and is just abocve the ground initially. Let the position of the charged particle now be G .. A man brings another charged particle from infinity to G along a straig ...

_____________________________________________________________ A ----------------------------- B l l → l l → ________________ _l_______________ _l_______________→_____________ l l l l D l-----------------------------l C ...

we know the shape of electric lines of force....we also know that they r imaginary...but wt is the basis of that shape?????gow can we say that they have that same shape????do v have a proof 4 it???? ...

coeficient of coupling betwn two coils of self inductance L1andL2 is unity it means 50% flux of L1 is linkd wid L2 100% flux of L1 is linkd wid L2 (L1)^1/2 times flux of L1 is linkd widL2 none ...

wen germanium is doped 1 part in a million wid indium itz ocnductivity increase by a factor of 10 10^3 10^6 10^5 gimme d formula or wat so stuff u noe n d answer ...

What will be the electrostatics force between two steel spheres each weighing 1 kg and separated by 1 m if each one of them has one percent more electron than protons. ...

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for protcting a sensitiev equipmnt frm xetrnal mag field it shud b a)placed in aluminum can b)placed in iron can c)wrappd in insulation wen passing cuurnt thru it d) surundd by fine copper shheet ...

1. The problem statement, all variables and given/known data The radius of the orbit of an electron in a hydrogen atom is 0.05 nm. Using the planetary model, calculate the orbital velocity needed by the electron to avoid bein ...

Two coaxial solenoids are made by winding thin insulated wire over a pipe of cross sectional area A = 10 cm2 and length = 20 cm. If one of the solenoids has 300 turns and the other 400 turns, their mutual inductance is ? ...

If a body is positively charged then a It may have more protons b It may have only protons c It may have only electrons d Both a and b ...

a thin nonconducting ring of radius R has a linear charge density f=f0cosα , where f0 is a constant , α is the azimuthal angle . find the electric field strength at the centre of the ring . CAN sombody tell me what is the a ...

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we know that electric lines of force never intersect but do they touch each other ? if yes , please give an example ; if no please give the explanation !! ...

Two small equally charged spheres each of mass m are suspended from the same point by silk threads of length l. The distance between the spheres is x<<l . find the rate dq/dt with which the charge leaks off each sphere ...

Q1. In an L-C circuit the values of C = 30 F and L = 15 mH. At an instant t, the charge on the capacitor is 10 C and the current is 20 mA. The maximum current in the circuit is (A) 17 mA (B) 19 mA (C) 25 mA (D) 42 mA ...

A point charge q is located at the centre of a thin ring of radius R with uniformly distributed charge -q. find the magnitude of the electric field strength vector at the point lying on the axis of the ring at a distance x fr ...

A thin non-conducting ring of radius R has linear charge density λ = λocosφ, where λ is a constant and φ is the azimuthal angle. find the magnitude of electric fiel strength on the axis of the ring as a function of the d ...

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StatI : For a mass M kept at the centre of cube of side a, the flux of gravitational field passing through its sides is 4Î GM. Stat II : If the direction of a field due to a point source is radial and its dependence on the di ...

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 ...

The resistance of the shunt required to make the range n times for an ammeter of ressistance R is (a) nR (b) (n –1)R c) R/(n –1) (d) R/n ...

If a charged glass rod is held near one end of an insulated uncharged metal rod . the electrons are drawn to one end . Q1: Why does the flow of electrons cease?considering that there is an almost inexhaustible supply of elect ...

if electric field is zero then is it necessary that potential is zero ...