Recently Active Electricity And Magnetism Questions

Identical thin rods of length 2a carry equal charges, Q, uniformly distributed along their lengths. The rods lie along the x axis with their centers separated by a distance of (in Fig. ). Show that the magnitude of the force ...

a cell has efficiency 60% when connected only to a resistance R. wt will be new efficiency of cell if resistance is increased to six times?? ...

The electric potential decreases uniformly from 120 V to 80 V as one moves from x= - 1 cm to x= + 1 cm.THE ELECTRIC FIELD AT THE ORIGIN IS : A)must be = 20V per cm B)may be = 20V per cm C)may be greater than 20V per cm D)may ...

in the exp. F=Q1Q2 ------- 4πεr2 if permitivity of the medium increases,the medium should permit more field lines.but actually the force decreases from the above exp. ...

The electric field vector is given by E = a√x i . Find the flux of E thru a cube bounded by surfaces x = l , x=2l , y = 0 , y=l , z=0 and z=l. ...

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wat is the capacitance when inner sphere is earthed and outer sphere is charged ? also show hw to found it ...

*Image* how to do these type of questions in which wheatstone bridge principle is not valid..... ...

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WE KNOW THAT EARTH HAS -VE CHARGED PARTICLES SPREAD OVER ITS SURFACE AND IN THE IONOSPHERES AND OTHER LAYERS ABOVE THE EARTH'S SURFACE THERE ARE +VELY CHARGED PARTICLES DUE TO COSMIC RAYS THAT IONISE AIR . SO POTENTIAL DIFFER ...

A sheet of uniform charge density σ n dimensions a x a . find the electric field n potential on an axis passing through the midpoint of the sheet and perpendicular to the sheet as a function of distance h from the midpoint ...

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A cone made of insulating material has total charge Q spread uniformly over its sloping surface. Calculate the work done in bringing a small test charge q from infinity to the apex of the cane. The cone has a slope length L. ...

a metal sphere of radius R is charged to potential V. a) find the electrostatic energy stored in electric field within a concentric sphere of radius 2R . b) show that the electrostatic energy stored outside the sphere of radi ...

*Image* Determine the equivalent capacitance between a and b. Each of the capacitor has capacity C. ...

lets take it to another level :P A horizontal rectangular plastic pipe of width w and height h, which closes upon itself, is filled with mercury of resistivity ρ. An over pressure P is produced by a turbine which drives this ...

hii...PLS EXPLAIN LOOP METHOD AND STAR DELTA CONVERSION FOR SOLVING CAPACITOR PROBLEMS... I AM SOLVING BY GENERAL Q=CV METHOD..BUT IN A SOLUTION BOOK I SAW THE USE OF ABOVE METHODS AS SHORTCUTS....SO IF U KNW PLS EXPLAIN...// ...

Two uniformly charged plane sheets S1 and S2 having charge densities ∂1 and ∂2 (∂1 > ∂2) are placed at a distance 'd' apart, parallel to each other. A charge q0 is moved along a line of length a (a < d) at cm an ...

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1.Consider a circle of radius R.A point charge lies at a distance a from its centre and on its axis such that R=a 3 .If electric field passing through the circle is ∂, find the magnitude of the charge. ...

why moving charges create magnetic field please answer it soon explain at atomic level ...

2 metal spheres of radii a and b are connected by a thin conducting spheres.There sep is very arge compared to there dimensions. Find the equivalent capacitance of the system. Since they are connected by a wire so the two sph ...

We know that drift speed of electrons in a conductor is given by v=l/t ,where l is the displacement and t is the time taken. In H.C. Verma it is written that as t decreases v decreases.How can this be true? ...

a point charge charge q is rotated along a circle in the electric field generated by another point charge Q. the work done by the electric field on the rotating charge in one complete revolution is (a) zero (b) positive (c) n ...

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In the AC network shown in fig., the rms current through the inductor and capacitor are 0.6A and 0.8A respectively. Then the current coming out of the source is *Image* this quest is also from arihant objectives.... plz help ...

the elecric potential decreases uniformly from 120V to 80 V as one moves on the x-axis from x=-1 to x= +1cm . the electric field at the origin (a) must be equal to 20 V/cm (b) may be equal to 20V/cm (c) may be greater than 20 ...

*Image* Ans.q2 only if you are 100°/° sure ...

if we keep a fish in btw the plates of a capacitor can we detect the freshness of fish ?????if yes then how??? try it .................................think!/..if u r able 2 answer it this really mean the surety of ur basics ...

hey friends.... plz help me put in this q from arihant objectives.... of alternating current..... As the frequency of the alternating current is increased , the impedence of the circuit (a) increases continuously (b) decrease ...