Recently Active Electricity And Magnetism Questions

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Ques) A coil of current crrying Nichrome wire is immersed in aliquid. When the potetial difference across the coil is 12 V and the current through the coil is 5.2 A., the liquidm evaporated at the steady rate of 21mg/sec. Cal ...

1) A potentiometer wire of length 100 cm has a resistance of 10 ohm. It is connected in series with a resistance and an accumulator of emf 2V and of negligible reistance.A source of emf 10 mV is balanced against a length of 4 ...

*Image* Ques1) In the above figure, show that the current in 3 ohm resistance is 1/7 A. Ques2) *Image* Find the current in branch CD of the circuit. Ques3) What would happen to the drift velocity of electrons in a wire and to ...

*Image* Ques) What are the size and direction (up or down) of current i where all resistance are 4 ohm and all batteries are ideal and have an e.m.f of 10V? ...

Here is a problem that i got stuck onto.Pls help me out. 1) A non-conducting sheet of large surface area and thickness 'd' contains uniform charge distribution of density 'ρ'.find the electric field at a point 'P'inside the ...

*Image* Each resistance is r.Show that the equivalent resistance b/w M and N is zero. ...

suppose u are moving parallel to a metal plate at a speed of electron in the current. do u measure a magnetic field to be zero ???????????????? ...

*Image* A charged capapcitor C1 is discharged through a resisitance R by Putting switch S in position 1 of circuit as shown in the figure. When discharge current reduces to I 0 , the switch is suddenly shifted to position2. C ...

*Image* A charged capapcitor C1 is discharged through a resisitance R by Putting switch S in position 1 of circuit as shown in the figure. When discharge current reduces to I 0 , the switch is suddenly shifted to position2. C ...

why is the charge on a charged spherical conductor assumed to be concentrated at the centre? ...

Three large identical conduction plates of area A are closely placed parallel to each other as shown ( the area A is perpendicular to plane of diagram).The netcharge on left,middle and right plates are QL,QM,QM respectively.T ...

in a cyclotron if we accelerate an electron its mass begins to increase according to the formula→M=M initial/√1-v2/c2....so if v electron →c...then the mass of the electron →infinity....but how can a particle with inf ...

1.Why is electricity obtained on heating a thermocouple? 2. Can copper and iron be combined to make a thermocouple? 3. Is there any other scale of temperature other than the celsius, farengeit and kelvin scale? 4. What is the ...

what is thermal agitation? what is it's effect over a dielectric as the magnitude of electric field changes?? ...

which of the following quantities do not change when a resistor connected to a battery is heated due to current ? (a)drift speed (b)resistivity (c)resistance (d)number of free electrons ...

A system consists of 6 parallel identical plates placed un-equal distance apart. A charge q has given in plate no.3 . The charge developed in outer surface of plate 1 & 6 is ?? ...

what is the really the physical meaning of Irms value of the current???? ...

the emf induced by the inductor is given by e= -L(di/dt) so when we apply the kirchhoff's law in the growth of RL circuit then the emf induced by the inductor should come to be +ve i.e. the eqaution should come "e - iR + L(di ...

*Image* A semi-circular wire of radius R is rotating with constant ang. velocity ω. Find the p.d. Between points O and A. A constant magnetic field exists. ...

In the figure, there is a square of side 'l'. Ends C and D are pulled with velocity u. Find the induced emf at the instance when angle ABD is θ. Magnetic field is into the plane of paper. *Image* ...

a capacitor of capacitance C is given a charge Q. at T=0 it is connected to a ideal battery of emf E through a resistance R. find the charge on the capacitor after time t ...

can you think why capacitors with water as dielectric medium is very rare for practical usage although water has the highest dielectric constant ? ...

Establish the current distribuition over 2 resisitances R1 & R2 connected in parallel corresponds to the minimum thermal power generated in the circuit ...

Ques1) Although the internal resistances of all sources of emf were neglected in the treatment of the potentiometer, it is really not necessary to make this assumption? Explain why internal resistances play no role in the mea ...

can anyone explain how to calculate equivalent capactace using connection removal method that is removal of an unwanted junction ...

Why cant a capacitor work in DC ?? ...

A fully charged capacitor has a capacitance C.It is discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat capacity s and mass m. If the temperature of the block is raised ...

prove that if the lines of force shaped like the arcs of concentric circles with their common centre at the point O in a certain section of a field,,then the electric field in that section should be proportional to the distan ...

Please post the complete solutions of the following numericals. I have tried to solve them many ..but unsuccessfully. 1) Two equal +ve point charges are separated by a distance 2a. A point test charge is located in a plane wh ...