Subject: Physics, asked on 10/12/11

## how does the angle of dip vary from equator to poles?

Subject: Physics, asked on 9/5/12

## What are the properties of Electric Lines of Force?

Subject: Physics, asked on 5/1/12

## What is Ohm's law in vector form.........???

Subject: Physics, asked on 26/5/14

## derive an expression for the total work done in rotating an electric dipole through an angle theta in a uniform electric field.

Subject: Physics, asked on 26/2/13

## Two capacitors C1 and C2 are charged to potential V1 and V2 resp. and then connected in parallel. Calculate common potential, charge on each capacitor and energy in the system after connection??

Subject: Physics, asked on 11/2/12

## Find the expression for the capacitance of a parallel plate capacitor of area A and plate separation d ifi) a dielectric slab of thickness t, andii) a metllic slab of thicknes t(where t<d) are introduced one by one between the platesof the capacitor. In which case would the capacitance be more and why?

Subject: Physics, asked on 5/6/13

## An electic dipole of length 2cm is placed with its axis making an angle 60 degree with respect to a uniform electric field of 105 N/C. If it experiences a torque of 13.856 Nm, calculate the- magnitude of the charge on the dipole & PE of the dipole.

Subject: Physics, asked on 10/5/13

## Charge q is uniformly distributed over a thin half ring of radius R .The electric field at the centre of the ring is?

Subject: Physics, asked on 11/6/11

## WHAT  ARE  THE  PROPERTIES OF EQUIPOTENTIAL SURFACES ?????????

Subject: Physics, asked on 2/2/13

## A parallel plate capacitor is charged by a battery. After sometime the battery is disconnected and a dielectric slab of dielectric constant K is inserted in between the plates. How would i) The capacitance ii) The electric field between the plates and iii) The energy stored in the capacitor be affected? Give reasons with necessary equations.

Subject: Physics, asked on 18/12/11

## The two point charges +9e  and +e  are placed at a distance of 16cm from  each other .At what point between the charges .At what point between the charges should the third charge q be placed so that it remains in equilbirium? Three point charges q1 ,q2,q3 are in line at equal distances q2 and q3 are in sign .Find the magnitude and sign of q1 ,if the net force on q3 is zero.ABC is an equilateral triangle of side 10 m and D is the midpoint of BC. charges of +100 miocrocoulomb ,-100 microcoulomb and +75microcoulomb are placed at B C and D respectively .Find the force on a +microcoulomb placed at A.At each of the four corners of a square  of side a ,a charge +q is placed  freely .What charge should be placed at the centre so that the whole system be in equilbirium?

Subject: Physics, asked on 10/4/13

## ChargeQ is distributed over two concentric hollow spheres of radii R1 and R2 (R2>R1) such that the surface charge densities areequal. Find the electric potential at the common centre.

Subject: Physics, asked on 12/1/14

## An electric dipole is held in a uniform electric field.a) Show that the net force acting on it is zero.b) The dipole is aligned parallel to the field.Find the work done in rotating through angle of 180 degree

Subject: Physics, asked on 25/7/13

## A spherical conducting shell of inner radius r1 and outer radius r2 has a charge Q. A charge q is placed at the centre of the cell.(a) What is the surface charge density on the (i) inner surface (ii) outer surface of the shell.(b) Write the expression for electric field at a point x r2 from the centre of the shell.

Subject: Physics, asked on 25/2/12

## Calculate the amount of work done in rotating a dipole, of dipole moment 3 x 10-8Cm, from its position of stable equilibrium to the position of unstable equilibrium of uniform electric field 104N/C..

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