Question

Q.1. Explain what is charge. State different types of
charges. Write down its unit and dimension,​

Answer 1

Answer:

1. It is the fundamental property of matter that causes it to experience a force when kept in electromagnetic field.

2. Charges are of two type: positive and negative.

3. It's unit is coulomb.

Answer 2

Answer:-

$\bigstar$ Charge:-

→ Charge is a basic property of electrons, protons and other sub atomic particles. Electrons are negatively charged while protons are positively charged.

★ Types of charges:-

→ There are two types of charges

• Like charge.
• Unlike charge.

★ SI unit of charge:-

→ SI unit of charge is called as coulomb (C).

★ Dimension of charge:-

→ The dimensional formula of electric charge is given by, [M0 L0 T1 I1]

Where,

• M = Mass
• I = Current
• L = Length
• T = Time

★ Derivation:-

Electric charge (Q) = current × time → (1)

The dimensional formula of,

Current = [I1] → (2)

Time = [T1] → (3)

From equation (1), (2) and (3) we get,

Since, electric charge = current × time

Or, Q = [I1] × [T1] = [T1 I1]

Therefore, the electric charge is dimensionally represented as [M0 L0 T1 I1].