Unanswered Electricity And Magnetism Questions

*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 < ...

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

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

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 ...

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* 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 ...

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

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 ...

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

*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 ...

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 ! ...

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 ...

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 ...

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.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 ...

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 ...

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

*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 ...

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

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* 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 ...

1) A potentiometer wire of length 100 cm has a resistance of 10 ohm. It is connected in series with a resistance and an accumulator of emf 2V and of negligible reistance.A source of emf 10 mV is balanced against a length of 4 ...

*Image* Ques1) In the above figure, an a meter bridge , two resistances in the gap are 5 ohms and 10 ohms. The wire resistance is 10 ohms. The emf of the cell connected at the neds of the wire is 5 volts and it's internal res ...

*Image* A highly expected question made by me with a GREAT mind The figure shows two capacitors of capacitance C and charge Q1 and Q2 respectively as shown in the figure.An uniform electric field E exists b/w the plates of th ...

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the impedance f a series circuit in an ac circuit is ...

THE RMS CURRENT FLOWING THROUGH THE INDUCTOR AND CAPACITORARE 0.6A AND 0.8A RESPECTIVELY.THEN CURRENT COMING OUT OF SOURCE *Image* ...

i dnt wnt ans,sum1 pls explain me the capacitance when charged inner sphere(radius a) is earthed.charged outer sphere has radius b.cant derive it. ...

some doubts in eloctromagnetism *Image* lets make it simple find the induced emf the rod is moving with a speed v towards the rite ...