Recently Active Electricity And Magnetism Questions

Two identical charges of magnitude +Q are fixed along the X-axis. A third charge −Q is placed midway between them at point P. Then small displacements of −Q are made in the directions indicated by the unit vectors. The ∠...

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A steady currentflows in metallic conductor of non uniform crossection.Quantity which are constant along length opf wire a)drift speed b)current ans is curent but how cna it be true becoz I=ne2AEÏ„/m ...

plz do(or give me some hints as to how to proceed) *Image* Ans is given as 3) ...

large metal sheet carries an electric current along its surface. Charge per unit length is (lamda) Magnetic field near the metal sheet is ; a) (mu) (lamda)/2 b) (mu) (lamda)/2 (pie) c) (mu)(lamda) d) (mu)/2 (lamda) (pie) *Ima ...

*Image* the first qsn.. answer given is d ...

*Image* the metallic ring and metallic disc problem ans given (metallic ring sum : d) (metallic disc sum :b) ...

*Image* (q. no 52 only) (ans given is B,D) ...

*Image* number 23 ans given is c ...

two concentric and coplanar coils have radii a & b (>>a) as shown in figure. Resistence of the inner coil is R. Current in the outer coil is increased from o to i, then the total charge circulating in the inner coil is: ...

*Image* a unoform magnetic filed of intensity 1T is appiled in a circular region of radius 0.1m directed in the plane of the paper . a charged particle of mass 5x10^-5 kg nd charge q=5x10^-4C enters the field with a velocity ...

Can anyone plzz explain the principal of superposition in electrical circuits I have learnt it before from Arihant But had some conceptual doubts Hence this thread ...

Q=50 uC , m=4 Kg , E=5 * 105,k=100 N/m show that block perform s.h.m ...

Q 1 -Find the electric field a distance z above the center of a square loop (side a) that has charge density sigma. Q-2 -Two spheres, each of radius R and carrying uniform charge densities +p and —p, respectively, are place ...

Two identical metallic balls of radius 2 m are placed in a homogenous poorly conducting medium with restivity 4 × 10^-3 m. The distance between them is much larger than their size. The resistance of medium between the balls ...

*Image* ANS> given is............(A) ...

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*Image* Q3. edit: word missing after tangential "acceleration" ...

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charged particle mass m ,charge q valocity v is projected radially in solenoid (radius R,turns per unit lentgh =n ,current =I). 1)Find time taken,angle subtended at centre of solenoid. 2)Find velocity of projection (tangentia ...

Charged particle mass m charge q is porjected perpendicular to magnetic field .Find angular deflection,sideways deflection and impulse of magnetic forces if b<mv/Bq *Image* ...

A solid conucting sphere havign charge Q is surrounded by uncharged concentric cinducting hollow spherical shell.Let tghe potential diff b/w surface of solid sphere and that of the outer surface of hollow shell be V.If hte sh ...

Q1 2 conducting spheres of radius r and 2r at a very large separation.Each sphere has acharge Q.These spheres are now connected with aconducting wire of resistance R.FInd current flowing in wire at t=2μs r=30cm,R=90 k Ω ,Q= ...

*Image* now 1) what is the significance of the minus sign before Blv ???? 2) what is the vector form of this formula.. like e.g. Fm = Bqvsin@ or q(v x B) 3) the book says E=0 if l or v is parallel to B if v is parallel E=0 I' ...

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Q. Is the coulomb force that one charge exerts on the another changes if othere charges are brought nearby? A. No but then..everybody knows that electrostatic force follows ineverse square law....is there any difference betwe ...

1) A thin insulating rod is charged in a uniform manner & the resulting linear charge density is λ. The rod is bent into the shape of a semi-circle. Find the magnitude of the electric field strength at the centre. 2) A Gold ...

an emf of V = 150 cos 377t is applied to a pure resistor of resistance 50 Ω . what is frequency of power variation ...

Two identical metal plates are given charges q1 and q2(<q1) respectively. If they are now brought close together to form a parallel plate capacitor with capacitance C. What will be the potential difference between the plat ...

Show that the enerystored in the series combination is the same as that in the parallel combination. ...