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.
-
A.
7.5A -
B.
2.5A -
C.
1.2A -
D.
0.8A -
E.
O.4A
Correct Answer: Option C
Explanation
P = VI ; I = P/V = 100/250 = 0.4A each
Total current 3 x 0.4 = 1.2A