MEDIUM
12th CBSE
IMPORTANT
Earn 100
Two similar balls each having mass and charge are hung from a silk thread of length . Prove that equilibrium separation,
when each thread makes a small angle with the vertical.
Important Questions on Electric Charges and Field
MEDIUM
12th CBSE
IMPORTANT
Five point charges, each of value coulomb are placed on five vertices of a regular hexagon of side metres. Find the magnitude of force on a charge coulomb placed at the centre of the hexagon.
EASY
12th CBSE
IMPORTANT
A simple pendulum consists of a small sphere of mass suspended by a thread of length . The sphere carries a positive charge . The pendulum is placed in a uniform electric field of strength directed vertically upwards. With what period will the pendulum oscillate if the electrostatic force acting on the sphere is less than the gravitational force?
EASY
12th CBSE
IMPORTANT
Four particles, each having a charge , are placed on the vertices of a regular pentagon. The distance of each corner from the centre is ''. Determine the electric field at the centre of the pentagon.
EASY
12th CBSE
IMPORTANT
An infinite number of charges, each equal to q are placed along X-axis at and so on. Find the electric field at the point due to this set up of charges.
MEDIUM
12th CBSE
IMPORTANT
An infinite number of charges, each equal to q are placed along X-axis at and so on. What will be the electric field, if in the above set up, the consecutive charges have opposite signs.
MEDIUM
12th CBSE
IMPORTANT
Two point charges and are placed distance d apart. What are the points at which the resultant electric field is parallel to the line joining the two charges?
EASY
12th CBSE
IMPORTANT
Eight identical point charges of coulomb each are placed at the corners of a cube of each side . Calculate the electric field at the centre of the cube. Calculate the field at the centre when one of the corner charges is removed.
EASY
12th CBSE
IMPORTANT
If the total charge enclosed by a surface is zero, does it imply that the electric field everywhere on the surface is zero? Conversely, if the electric field everywhere on the surface is zero, does it imply that the charge inside is zero?
