A proton and an -particle are at a distance r from each other. After letting them free if they move to infinity, the kinetic energy of the proton will be -
1.
2.
3.
4.
small water drops, each of radius r and each carrying charge q, combine to form one bigger drop. The potential of a bigger drop as compared to that of a smaller drop will be.
1.
2.
3.
4.
The plates of a parallel plate capacitor have an area of each and are separated by . The capacitor is charged by a 400 volt supply. How much electrostatic energy is stored by the capacitor?
1.
2.
3.
4.
An alpha particle with kinetic energy is heading towards a stationary nucleus of atomic number . Calculate the distance of closest approach.
1.
2.
3.
4.
Calculate the area of the plates of a one farad parallel plate capacitor if the separation between plates is and plates are in a vacuum.
1.
2.
3.
4.
A solid conducting sphere of radius a having a charge is surrounded by a concentric conducting spherical shell of inner radius and outer radius as shown in figure.
Find the amount of heat produced when switch is closed.
1.
2.
3.
4.
A parallel plate capacitor of area ‘A’ , plate separation ‘d’ is filled with two dielectrics as shown. What is the capacitance of the arrangement ?
1.
2.
3.
4.
Assertion : A particle of mass m and charge moves directly towards a fixed particle , which
has charge . The speed of is when it is far away from . The minimum separation
between the particles is proportional to .
Reason : Total energy remains conserved.
Assertion : Potential difference between two points lying in a uniform electric field may be equal
to zero.
Reason : Points of line normal to electric field is equipotential line.
Assertion : At a distance r from a +ve charged particle potential is V and electric field strength is E.
Then graph between & is straight line.
Reason : For a point charge