Physics
Assertion (A): In series combination of electric bulbs, the bulb of lower power emits more light than that of the higher power.
Reason (R): The lower power bulb in series gets more current than the higher power bulb
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false
Related Questions
Three bulbs A, B and C are connected as shown in the figure. What changes are seen in brightness of the bulbs if switch S is closed?
- The brightness of bulb A decreases and that of C increases.
- The brightness of bulb A increases but that of C decreases.
- The brightness of both bulbs A and C decreases.
- The brightness of both bulbs A and C remains the same.
A bulb B1 100 W, bulb B2 60 W and bulb B3 40 W are connected as shown in the figure. The output powers of these would be :
- W1 < W2 < W3
- W1 = W2 > W3
- W1 > W2 > W3
- W1 > W2 = W3
Assertion (A): In parallel combination of electrical appliances, total power consumption is equal to the sum of the power of individual appliances.
Reason (R): In parallel combination, the voltage across each appliance is the same.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false
Write an expression for the electrical energy spent in flow of current through an electrical appliance in terms of current, resistance and time.