EASY
12th CBSE
IMPORTANT
Earn 100

Two equal spheres of water having equal and similar charges coalesce to form a large sphere. If no charge is lost, how will the surface densities of electrification change?

Important Questions on Electric Charges and Field

EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>Problems For Practice>Q 1
An electric dipole is formed by +4 μC and -4 μC charges at 5 mm distance. Calculate the dipole moment and give its direction.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>Problems For Practice>Q 2
An electric dipole of dipole moment 4×10−5Cm is placed in a uniform electric field of 10−3NC−1 making an angle of 30o with the direction of the field. Determine the torque exerted by the electric field on the dipole.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>Problems For Practice>Q 3
A dipole consisting of an electron and a proton separated by a distance of 4×10−10m is situated in an electric field of intensity 3×105NC−1 at an angle of 30o with the field. Calculate the dipole moment and the torque acting on it. Charge on an electron =1.602×10−19C.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>Problems For Practice>Q 4
An electric dipole is placed at an angle of 60o with an electric field of magnitude 4×105NC−1. It experiences a torque of 83 Nm. If the length of the dipole is 4 cm, determine the magnitude of either charge of the dipole.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>Problems For Practice>Q 5
An electric dipole consists of two opposite charges of magnitude 2×10−6C each and separated by a distance of 3 cm. It is placed in an electric field of 2×105NC−1. Determine the maximum torque on the dipole.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>Problems For Practice>Q 6
Two point charges of +0.2 μC and −0.2 μC are separated by 10−8m. Determine the electric field at an axial point at a distance of 0.1 m from their midpoint. Use the standard value of ε0.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>Problems For Practice>Q 7
Calculate the field due to an electric dipole of length 10 cm and consisting of charges of ±100 μC at a point 20 cm from each charge.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>Problems For Practice>Q 1
If the electric field is given by E→=8ı^+4j^+3k^ NC−1, Calculate the electric flux of this through a square surface of area 100 m2 lying in the X-Y plane.