A factory is served by a 220 V supply line. In a circuit protected by a fuse marked 10 A, the maximum number of 100 W lamps in parallel that can be turned on is

Question

A factory is served by a 220 V supply line. In a circuit protected by a fuse marked 10 A, the maximum number of 100 W lamps in parallel that can be turned on is (A) 11 (B) 22 (C) 33 (D) 66

Tardigrade Admin · Accepted Answer

Current required by each bulb, i= (P/V)= (100/220)A In n bulbs are joined in parallel, then ni=ifuse or n × (100/220)=10 or n=22

Q. A factory is served by a 220 V supply line. In a circuit protected by a fuse marked 10 A, the maximum number of 100 W lamps in parallel that can be turned on is

11

22

33

66

Current required by each bulb,
$i = \frac{P}{V} = \frac{100}{220} A$
In n bulbs are joined in parallel, then
$ni = i_{f u se}$
or $n \times \frac{100}{220} = 10 or n = 22$

Q. A factory is served by a 220 V supply line. In a circuit protected by a fuse marked 10 A, the maximum number of 100 W lamps in parallel that can be turned on is

11

22

33

66

Current required by each bulb, i=VP​=220100​A In n bulbs are joined in parallel, then ni=ifuse​ or n×220100​=10orn=22

Current required by each bulb,
$i = \frac{P}{V} = \frac{100}{220} A$
In n bulbs are joined in parallel, then
$ni = i_{f u se}$
or $n \times \frac{100}{220} = 10 or n = 22$