Assertion (A): It is observed that sometimes a bulb glows brighter and sometimes it glows dimly.
Reason (R): Glowing brighter and dimmer depends on the heating effect of the current. More current produces more heating effect making the bulb glow brighter and vice-versa.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
Both A and R are true and R is the correct explanation of A.
The explanation for Assertion:
The explanation for reason:
Thus, both assertion and reason are true and Reason is the correct explanation of Assertion.
Hence, option (A) is the correct answer.