A given charge situated at a certain distance from on electric dipole in the end on position experiences a force F.If the distance of the charge is doubled the force will be
2F
F/2
F/4
F/8
The value of electric charge on any object cannot be less than
4.9*10-19 c
Ic
3.2*10-19c
1.6*10-19c
when a body is negatively charged by electrostatic conduction its mass will
Slightly increases
Slightly decreases
remains the same
increase or decrease depending on material.
Two conducting spheres of radii 5cm and 3cm are charged so that the electric field on their surface are same.The ratio of the charges will be
3:5
5:3
9:25
25:9
When a soap bubble is negatively charged
It collapses
It increases in size
It decreases in size
It remains as such
A charge q is placed at the centre of the line joining two equal charges Q.The system of the three charges will be in equlilibrium if q is equal to
-Q/2
-Q/4
+Q/4
+Q/2
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
An infinite number of electric charge each of magnitude +ve are arranged along the x axis at a distance x=1m,x=2m,x=4m,x=8m..........etc The electric field at the origin will be
1/2πεo
e/3πεo
e/5πεo
e/6πεo
A rectangular coil of area 200cm2 is placed in an electric field 200k^ in Y.Z plane.The electric flux through the coil will be
zero
4*104
40
4
Insulted copper spheres of radii 0.1m and 0.15m and having equal charges are connected by a copper wire and separated then
both spheres will have the same charge
smaller sphere will have greater charge.
bigger sphere will have greater greater charge
Charge on either sphere becomes zero.
