Recently Active Electricity And Magnetism Questions

*Image* find d emf[V] & internal resistance [r] of a single battery which is equilant to a parallel combination of 2 batteries of emf's v1 &v2 & internal resistances r1 &r2 resply with polarities as shown in fig ...

*Image* all the plates hv been given the indicated charges.find the charge n left side of plate with charge q a)-8q b)9q c)0 d)none andplease not just options give a propr solution ...

a CHARGED PARTICLE & AN UNCHARGED PARTICLE..HAVE THE SAME LINEARvelocity.tHEY WILL HAVE THE SAME DE-BROG;IE WAVELENGTH.. tRUE OR FALSE.. i AM GETTING FALSE BUT ANSWER IS TRUE ...

Two charges of values 5μC and 2μC are placed inside and outside of a uncharged conducting shell at a distance of 3 m. The force on 5μC charge will be: a. 10mN b. 5mN c. Zero d. can't be found ...

What amount of heat will be generated in the circuit shown after the switch Sw is shifted from position 1 to position 2? *Image* ...

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

*Image* plz explain wt to do.. ...

koi bhi kar sakta hai bas [3] *Image* ...

A conducting spherical shell of rad. R is placed concentrically inside another similar shell of rad. 2R. The inner shell has a charge Q. If it's connected to the outer shell by a coducting wire , find loss in elec.energy .... ...

Two circular rings A and B each of radius a=30cm are placed coaxially with their axes horizontal in a uniform electric field E=10^5 N/C directed vertically upwards.distance between the centres of these rings A and B is h=40 c ...

calculate the magnetic induction at a point 1 Angstrom away from a proton , measured along its axis of spin. magnetic moment of proton is 1.4 x 10^ -26 A-m^2 ...

(A) : When a body is connected to earth,all its charge flows to earth and it becomes electrically neutral. (R) : Electric potential of earth is zero,so the body connected to earth should also attain zero potential. ...

A Large spherical shell(radius r, charge q) rotating with angular velocity is placed in gravity-free space, having uniform magnetic field, suc that its direction is perpendicular to the axis of rotation. If the mass of shell ...

*Image* A wire of length l has current i apply amperes law ∫B.dx=μi B.2pir=μi B=μi/2πr ...(:P same as of infinite wire.) But we know it should be B=μi(sinα+sinβ)/4πr Explain what is wrong.. [3] ...

*Image* the battery of volatge V=10 V .. three capacitors each of 3μF and 5 resistors each of 1Ω are aranged as shown in the fig. arrangement is left for long time so that steady state is reached. then: 1) charge on cap 1 2 ...

*Image* The left side of the plane has 0 potential and right has a positive potential. a positive charge is incident at boundary as shown with sufficient velocity as to enter right region. The excepted path in right side is I ...

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 ...

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

i have solved it ............it is for u all very good question in the given circuit all capacitors are initially uncharged.After closing S1 for long time,suddenly S2 is also closed and kept closed for long time.Total heat pr ...

a rregular poly gon of n sides is formed by bending a wire of total length 2Î R which carries a current i . find the magnetic field at the centre of the polygon. ...

suppose, the electric force between two charged particles were independent of distance.in this case would a neutral insulator still be attracted towards comb?????????????? who ever replies solid reasons are a must. ...

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a metal sphere is suspended from a nylon thread.initially sphere is unharged.when a positively charged glass ro is brought close,sphere is drawn towards rod,if it touches rod,it suddenly flies away.explain. i think reason is ...

tank circuit ................................................................................ Let me see if u can calculate this.. What is the total impedence of a tank circuit . ...

Full Test 1 dbt : I didnt get how the circuit provided in solution given come about ?? *Image* ...

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*Image* find equivalent resistance between A and B ...

a large sheet carries uniform surface charge density sigma and a rod of length 2l has a linear charge density lambda on 1 half and -lambda on other half the rod is hinged at midpoint O and makes an angle theta with the normal ...