Electromagnetism

Question 1

What is electric charge

Answer 1

Electric charge is an abstract concept because it’s invisible to us

Question 2

What are the immutable property of fundamental particles

Answer 2

1. Mass
2. Spin
3. Electric charge

Question 3

Electric charge is everywhere, yet we rarely notice electric forces between everyday objects. Why might this be?

Answer 3

In most of the objects, there are almost the same number of protons and electrons

Most matter is neutral — it has no excess electric charge

Question 4

What is a field

Answer 4

It is a mathematical object describing some property (e.g a number denoting temperature)of every point in a space.

Fields are essentially functions — their domain is all of space (or some particular part of it, like the surface of Earth).

Question 5

Formula for force due to two electric charge

Answer 5

F =(k * Q1 * Q2) / r^2

k: constant
Q: Charge
r: distance between two charges

Question 6

Formula for force due to electric field

Answer 6

F = q * E

q: charge which experience force
E: electric field

Question 7

Formula of electric field created due the charged plate

Answer 7

E = 2 * pi * k * Q / A

Q: Electric charge
A: Area of plate