Which of the following is a vector quantity?
Electric potential
Electric Intensity
Capacitance
Dielectric constant
Two charged balls attract each other with a certain force.If they are allowed to touch and then separated to the same distance appart the two balls will
Attract with smaller force
Attract with greater force.
Repel with smaller force
Repel with greater force.
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
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.
The dimensions of capacitance are
M-1 L-2 T2 I2
M-1 L-1 T2 I2
M-1 L-2 T3 I2
M-1 L-2 T4 I2
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
A parallel plate capacitor is charged by connecting the plates to a battery. The battery remains connected and a glass plate is inserted between the plates of the capacitor then
charge in the capacitor increases
charge in the capacitor decreases
voltage on the capacitor increases
voltage on the capacitor decreases
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
If the distance between the plates of a charged parallel plate capacitor is reduced to half of its original value, the capacity of the capacitor is
Increased two times
Reduced to half of its original value
Increased to 4 times
Remains unaltered
Two conducting spheres of radii 5cm and 3cm are charged so that the electric field on their surface are same. Calculate the ratio of the charges ?
3:5
5:3
9:25
25:9
