# What is the dimension of electric charge?

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What is the dimension of electric charge?
1. [A1 T1]
2. [A-1 T-1]
3. [A1 T-1]
4. [A-1 T1]

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Correct Answer - Option 1 : [A1 T1]

CONCEPT:

Electric Charge

• It is defined as the intrinsic property of certain fundamental particles like electrons, proton, etc, due to which they produce electric and magnetic effects.
• Types of electric charge
1. ​Positive charge: A body having a deficiency of electrons.
2. ​Negative charge: A body having an excess of electrons.
• Properties of electric charge
• Like charges repel and unlike charges attract each other.
• A charge is a scalar quantity.
• The unit of charge is the coulomb.

⇒ 1 coulomb = charge on 625 × 1016 electrons

EXPLANATION:

As we know, mathematically electric current is written as

$⇒ Current (I) = \frac{Charge(Q)}{time (t)}$

The above equation can be written as,

⇒ Charge (Q) = Current (I) × times (t)

• The dimension of electric charge is given as,

⇒ [Q] = [A1 T1]

• Hence, option 1 is correct.