| Assertion (A): Capacitor blocks dc and allows ac to pass. |
| Reason (R): Capacitive reactance is inversely proportional to frequency. |
A) Both A and R are true and R is the correct explanation of A
B) Both A and R are true but R is NOT the correct explanation of A
C) A is true but R is false
D) A is false and R is true
Correct Answer: A
Solution :
| Option [a] is correct |
| Explanation: Capacitive reactance = \[\frac{1}{2\pi fc}\] |
| So, as (frequency) increases, reactance decreases. |
| For dc, frequency = 0, hence capacitor offers infinite reactance. So, it blocks dc. |
| For ac, frequency \[\ne \]0, hence capacitor offers low reactance and allows ac to pass. |
| Hence assertion and reason both are true. Assertion is properly explained by reason. |
You need to login to perform this action.
You will be redirected in
3 sec
