Question

Assertion (A): Electric current is a vector quantity.
Reason (R): It has both magnitude and specific direction.
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true and R is the not correct explanation of A
c) A is true, R is false
d) A is false, R is true​

Answer 1

Answer:

(D) A is false, R is true.

Explanation:

Electric current is NOT a vector quantity though it has a direction.

A vector is a quantity which has a variable direction. Electric Current is a unidirectional quantity and hence is not considered as a vector. Moreover, it doesn't hold good with the vectorial laws too.

Answer 2

Answer:

Explanation:

Assertion (A): Electric current is a vector quantity.

Reason (R): It has both magnitude and specific direction.

The answer is d) A is false, R is true​.

A question arises that why electricity is considered as Scalar Quantity?

For this we need to consider the statements:-

• An electric current in an circuit has magnitude and direction.
• The direction is in either positive or negative.
• And, magnitude depends on the amount of potential difference created across the circuit.

Now, from many calculations, it has been found that electricity does not follow the laws of vector addition.

[Consider if a child is not following the rules and regulations of a school, how he can be considered as eligible student of that school?]

In this case too, how can be consider as vector quantity even if it doesn't  not follow the laws of vector addition?

However, it follows simple algebra, which is under scalar quantity criterion.

Hence, electricity is considered as scalar quantity, not vector quantity.