EASY
12th CBSE
IMPORTANT
Earn 100

An infinitely long wire is stretched horizontally 4 metre above the surface of the earth. It carries a charge 1 μC per cm of its length. Calculate its electric field at a point on the earth's surface vertically below the wire.

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 4
Two large metal plates each of area 1 m2 are placed facing each other at a distance of 10 cm and carry equal and opposite charges on their faces. If the electric field between the plates is 100 NC−1, find the charge on each plate.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>Problems For Practice>Q 5
An electron is revolving around a long line charge having charge density 2×10−8C m−1. Find the kinetic energy of the electron, assuming that it is independent of the radius of electron's orbit.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>Problems For Practice>Q 6
A particle of mass 5×10−6g is kept over a large horizontal sheet of charge density 4×10−6Cm−2. What charge should be given to this particle, so that if released, it does not fall down. How many electrons should be removed to give this charge?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>Problems For Practice>Q 7
A spherical shell of metal has a radius of 0.25 m and carries a charge of 0.2 μC. Calculate the electric field intensity at a point (i) inside the shell, (ii) just outside the shell and (iii) 3.0 m from the centre of the shell.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 1
The electric charge of any body is actually a surplus or deficit of electrons. Why not protons ?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 2
When a glass rod is rubbed with silk, both acquire charges. What is the source of their electrification?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 3
Is the mass of a body affected on charging?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 4
Two identical metallic spheres of exactly equal masses are taken. One is given a positive charge q coulombs and other an equal negative charge. Are their masses after charging equal?