In the diagram above, three identical lamps each of 100 W are connected in parallel across a potential difference of 250 V. Calculate the reading of the ammeter.
- 7.5A
- 2.5A
-
1.2A
- 0.8A
- O.4A
The correct answer is: C
Explanation
P = VI ; I = P/V = 100/250 = 0.4A eachTotal current 3 x 0.4 = 1.2A