No student devices needed. Know more
15 questions
The expression for Electric potential due to a point charge at a distance 'r' from it is____________
4πϵ 0 1 rq2
4πϵ 0 1 rq
4πϵ 0 1 r2q2
4πϵ 0 1 r2q
Electric potential at a point due to a dipole is
4πεo1 r3p⃗.r⃗
4πεo1 r2p⃗.r⃗
4πεo1 rp⃗.r⃗
4πεo1 p⃗.r⃗
The relation between electric field and electric potential is
E=dV.dr
V=dE.dr
V=−drdE
E=−drdV
The magnitude of electric potential is ______ at an infinite distance.
0
negative infinity
positive infinity
200
What is the electrostatic potential at equatorial point of a dipole?
twice of the axial point
half of the axial point
zero
not defined
Two charges +q and -3q are placed at a distance of 1m apart. The points on the line joining two charges, where electric potential is zero, is :
0.25 m, 0.5 m
1 cm , 0.50 m
0.35 cm , 24 cm
none of these
A positive charge Q is placed very close to the positive plate of a parallel plate capacitor that produces an electric field E . Once released, the positive charge reaches the negative plate a distance d away with a kinetic energy of
Ed
QEd
2Ed
2QEd
A student generates an equipotential map of a point charge and notices the electric potential decreases the further away from the charge. From only this information the student can determine which of the following?
The charge is positive
The charge is negative
The magnitude of the charge
Nothing, more information is required
A positive charge +Q is placed a distance d from a negative charge −Q . Note these charges have the same magnitude but different sign. Which of the following is true about the electric field and the electric potential at a point midway between the two charges?
The electric field is zero and the electric potential is zero
The electric field is not zero and the electric potential is zero
The electric field is zero and the electric potential is not zero
The electric field is not zero and the electric potential is not zero
These form a surface where the electric potential is constant everywhere on the surface.
Gaussian surface
Flux surface
Equipotential lines
Equatorial lines
Electric potential due to a point charge –q at distance x from it is given by:
Kq/x2
Kq/x
-Kq/x2
-Kq/x
Electric field and electric potential inside a charged spherical shell :
E = 0; V = 0
E = 0 ; V ≠ 0
E ≠ 0 ; V = 0
E ≠ 0 ; V ≠ 0
Explore all questions with a free account