i. | \(C\) is highest. | brightness of bulb
ii. | \(A\) fails, \(B\) will not glow. | if
iii. | \(C\) fails, brightness of bulb \(D\) increases. | if
1. | (i) only |
2. | (ii) only |
3. | (i) and (ii) only |
4. | (ii) and (iii) only |
Assertion (A): | When an external resistor of resistance R (connected across a cell of internal resistance r) is varied power consumed by resistance R is maximum when R=r. |
Reason (R): | Power consumed by a resistor of constant resistance R is maximum when the current through it is maximum. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |