Recently Active Electricity And Magnetism Questions

A point charge Q is at a distance l from a infinite conducting plane.What amount of work has to be performed in order to slowly move the charge far away from the plane. ...

*Image* consider an infinite ladder network shown in figure voltage is applied between points A and B . If the value of voltage is halved after each section , then the ratio of R1/R2 Will be a. 1 b.1/2 c.2 d.3 ...

*Image* the figure shows the variation of electric field along the x axis how many position are there of 1. stable equllibrium?? 2.unstable equilibrium?? 3.total number position of equlibrium state?? ...

A 4f capacitor and 6f capacitor are connected in parallel across a 660 v parallel source. The charged capacitors are now disconnected from the line and from each other with terminals of unlike signs together.find the final ch ...

why during discharging of a capacitor emf the cell is taken to be zero ...

Multiple answer correct: There exist an electric field in space given by the relation E=E"x^n i Consider an imaginary cube of side l , centred at (l/2,l/2,l/2) whose faces are parallel to xy, yz and zx planes. Select the corr ...

*Image* A conductor of length l has a non uniform cross section . The resistivity of the material is ρ. Assume b-a<<l ,find the resistance of the conductor across its end ...

tha dielectric constant decreases if the temperature is incresed.explain this in terms of polarisation ...

*Image* Three identical batteries each emf 4V and negligible internal resistance are connected as shown in the figure . The potential difference between the points A and G (VA-VG) A. 4V B. -4V C. 8V D.-8V The unit of the resi ...

It is neutral conductor. 1) Determine the potential of the conductor 2) Determine the potential at A, B and C due to induced charges. *Image* ...

what is meta and parasitic magnetism .............plz explain ???????????????? ...

The space between the plates of a parallel plate capacitor is filled consecutively with 2 dielectrics 1 and 2 having thicknesses d1 and d 2 and permittivities as ε1 and ε2 respectively . The area of each plate is S . Find t ...

Q. Find the total potential energy gained by a capacitor which is connected to a battery of emf V as a dielectric slab of dielectric constant K is allowed to enter slowly into the capacitor. Assume it is a parallel plate capa ...

what is magnetostriction effect ??????? ...

Q1) the drift speed is defined as vd= \Delta L/ \Delta t where \Delta L represents distancedrifted in a long time \Delta t why don't we define drift speed as the limit of \Delta L/ \Delta t as \Delta t→0 Q2)one of friends a ...

*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 ...

what is the direction of currentdensity ? direction of driftvelocity r current ...

*Image* the dimensions of conductor of specific resistance ρ is shown above what is the resistance across AB ? ...

1)pls tell me the purpose of writing the constant K=1/4∩ε. And couloumb had discoverd only its numerical value by his experiments am i rite. 2)The force between two charges is inversely proportional to r2 is the power is a ...

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

Current is scalar or vector???? ...

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 ...

*Image* solve the 3.20 ...

If two bulbs of 25 W and 100 W are rated @ 200V are connected in series across a 440 V supply then-- A. 100 W bulb will fuse B. 25 W bulb will fuse C. none of the bulb will fuse D. both the bulbs will fuse Pls show working. ...

what is the electrostatic potential at a distance r from the center of a charged metallic sphere of radius R(r<R).................Plz show thw graph of potential with distance also. ...

the plates of a parallel plate capacitor are charged upto 100 v .a 2mm thick insulator sheet is inserted btn plates . to maintain same potential diff .the distance btn plates is in creased by 1.6mm. the dielectric constant of ...

Can nyone pls explain the concepts involving ammeter and voltmeter? Also explain y they give lower reading than actual ...

we know that the electric field of a straight lamina with zero thickness (i.e. an infinite planar sheet) is EF = surface charge density 2 epsilon now, surface charge density and epsilon are constants. this means that " In an ...

A charge of 200 μC is imparted to each of the 2 identical parallel plate capacitor connected in parallel. At t=0, the plates of both capacitors are placed 1 m apart. The paltes of 1st capacitor moves towards each other with ...

*Image* the size of the loop is reduced by pulling at the wire shown with constant velocity v.B is the magnetic field.At the given instant,the induce emf accross the loop is???????? a.Bvr (r is the radius at the given instant ...