Electric potential at the equatorial point of a dipole is
1/4π∈0 P/r2
-1/4π∈0 P/r2
1/4π∈0 P/r
Zero
If W is the work done in moving a charge q from infinity to a point, then the potential at the point is
v = w/q
v = q/w
v = qw
v= Eqw
Two charges q1 and q2 are seperated by a distance d in air.A dielectric slab of thickness t of relative permittivity k is introduced between them.The force between the two charges is nearly given by
1/4πεo q1q2/(d-t)2
1/4πεo q1q2/(d-t+t/k)2
1/4πεo q1q2/(d-t+t√k)2
1/4πεo q1q2/(d+kt)2
SI Unit of electric potential is
Watt
Volt
Coulomb / joules
Newton/ Coulomb
The electric potential V at a certain point distant x metre from the origin is given by V(x)= (5x2+10x-9) volt. The electric field at x=1m will be :
20 v/m
-10 v/m
10 v/m
-20v/m
Which of the following will not alter the capacitance of a parallel plate capacitor ?
Change is the area of the plates
Change is the distance between the plates
Change is the dielectric medium
Change is the charging potential
The supply of an additional charge to a charged capacitor will
Reduce its potential
Increase its potential
Reduce its capacity
Reduce the permittivity of the medium.
When a parallel plate capacitor is kept connected to a battery and the distance between the plates is increased.
Its capacity remains constant
Its charge remains constant
Its potential remains constant
Its energy remains constant
When a sheet of glass is introduced between the two plates of a parallel plate capacitor, then which of the following quantities will increases?
Electric potential
The magnitude of the electric force
The electric intensity
The capacity of the capacitor
Which of the following is a non polar dielectric ?
Hcl
NH3
H2O
O2
