| Directions: (1 - 65) For Assertion and Reason Type Questions |
| In this type of question, a statement of assertion [A] is followed by a statement of reason [R]. |
| Mark the correct choice as : |
| ASSERTION: Current is a scalar quantity. |
| REASON: Electric current arises due to continuous flow of charged particles or ions. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and reason is not the correct explanation of assertion.
C) If assertion is true but reason is false.
D) If both assertion and reason are false.
E) If assertion is false but reason is true.
Correct Answer: B
Solution :
Current is a scalar quantity, it is justified by the following two observations. (i) If current carrying wire is bent at some point, then also current in the wire remains same while a vector quantity always changes by changing direction. (ii) Current flowing in the circuit do not follow the laws of vector addition. It follows according to ordinary rule of algebra. This makes it clear that current is not a vector but a scalar quantity. Also current is defined as rate of flow of charge through the wire\[I=\frac{dq}{dt}\].
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