Recently Active Electricity And Magnetism Questions

MULTI ANSWER CORRECT *Image* How to do the charge distribution here? ...

Q(1) An inductor is connected to a battery through a switch. Explain why the emf induced in the inductor is much larger when the switch is opened as compared to the emf induced when switch is closed .( not a doubt) Q(2) A met ...

A straight rod of mass m and length l can slide on 2 parallel plastic rails kept in a horizontal plane with a seperatrion d……coefficient of friction between wire and rails is u….if current in wire is i…wat mag filed m ...

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A hypothetical mag field existing in a ragion is given by \vec{B}=B_{0}\vec{e_{r}} wer e_{r} denotes unit vector along the radial direction of a point relative to the origin and B0=constant.....A circular loop of raduis a car ...

*Image* and ya diatance b/w point A and infinite length wire is L ...

a block of mass m and having a charge q placed on a smooth horizontal table and is connected to a wall through an unstretched spring of spring const. k.a horizontal electric field E is paraalel to spring is switched on.find a ...

*Image* Question. What amount of heat will be generated from the circuit shown in the above fig. after the switch sw is shifted from position 1 to position 2??? answer is Q= ε2C Co/2C+Co please show ur steps?? ...

help i hav some doubts in it....des r easy *Image* ...

*Image* the charge q is being brought in from infinity dWfield = Fdr cos180 →dWext = Fdr du=dwext= Fdr r r ∫du=∫Fdr ∞ ∞ U =- kQq/r (Assuming potential energy at infinity to be 0) Here i am bringing in a positive cha ...

A non conducting ring(mass m,radious r,having charge Q) is placed on a rough horizontal surface(in a cylindrical region with tranverse magnetic field ).The field is increasing with time at the rate R and the coefficient of fr ...

Consider cylindrical region of the magnetic field shown in figure. region 1 and region 2 have magnetic field directed perpendicularly outward and inward respectively . fields are varying with time as region1 :B=3kt region 2:B ...

A galvanometer is to be converted into an ammeter or voltmeter.In which of the following cases is the resistance of the device maximum : (a)Ammeter with range 10 A (b)Voltmeter of range 5V (c)Ammeter of range 5 A (d) Voltmete ...

15 identicle capacitances each of 1uf are conected in a hexagonal network ABCDEF such taht each vertex is connected with each of the others directly by 1uf cap...the cap and wires r insulated from each oder(imagine ech of the ...

*Image* Using KIRCHOFFS laws calculate the PD across 8Ω resistor ...

A point charge q moves from point P to point S along the path PQRS in a uniform field E pointing parallel to the positive direction of the X-axis.The coordinates of the point P,Q,R and S are (a,b,0),(2a,0,0),(a,-b,0) and (0,0 ...

*Image* Find R so that load voltage remains 18 volts as input voltage is free to vary from 22 V to 28 V.Zener diode shown can maintain a constant voltage of 18 V for I between 2mA and 200mA.Rl(load resistance) is 18ohm ...

ASSERTION &REASONING STATEMENT 1: A +ve charged sphere & a -ve charged sphere r kept at finite distance. The total electrostatic P.E. of system must b -ve. STATEMENT 2: P.E. btwn 2 like charge particles is +ve & -ve for 2 unl ...

1)For an LR circuit at t=0 , rate at which magnetic energy gets stored in the inductor (A)Decreases continuously (B)Increases continuously (C) First increases and then decreases (D)First decreases & then increases ...

A conducting loop of radious R is placed in a uniform ,tranverse magnetic field region of strength B. radious of the loop is increasing with time as r=r0. Induced emf in the loop varies with time as (center of the loop coinsi ...

In which of the following arrengement if we apply 10 volt across A and B the PD across C and D is found to be 7 volt, but when we apply 10 volt across C and D the PD across A and B is found to be 10 volt? *Image* ...

In which of the following arrengement if we apply 10 volt across A and B the PD across C and D is found to be 7 volt, but when we apply 10 volt across C and D the PD across A and B is found to be 10 volt? *Image* ...

Q) A point charge Q is placed at a distance 'a' above a horizontal plate which is infinitely large. find the flux passing through the horizontal plate? ...

A point charge q is placed at a corner of a cube. Find the flux passing through the cube ? If you are through with the 1st part , try to find out the flux passing through the surface of the above cube which lies opposite to t ...

Q. Consider a long, straight wire of cross-sectional area A carrying a current i. Let there be n free electrons per unit volume. An observer places himself on a troley moving in a direction opposite to the current with a spee ...

*Image* A loop of radius a and resistance R uniformly distributed over it is placed perpendicular to a magnetic field B as shown. A rod AB of negligible resistance starts rotating with angular speed w. At t=0, theta = 0. A co ...

Q.) A point charge q = 1C is placed at a distance 10 metres from the center of a neutral conductor. What is the potential on the surface of the conductor ? Give proper explanations ! ...

Q) There is a uniform solid sphere with charge density 'd' and radius 'R'. Now some part of the solid sphere is removed from it. The removed portion is also a sphere of radius 'R/2'. Thus we are left with a solid sphere and a ...

A non conducting sheet of larg surface area and thickness d contains uniform distributoin of density ∂. find E at a pt. P inside the plate, at a dist. x from the cetral plane. ...

A uniformly charged ring of radius 0.1 m with afrequency 104 rps about its axis. The ratio of energy density of electric field to the energy density of magnetic field at a point an the axis at the distance 0.2 m from the cent ...