Question

When four 40W bulbs are connected in series at 220V find the flow of current in each bulb

Answer 1

1000 voltage
each bulbs have 1000 voltage

Answer 2

A = W/ V........... Current ( Ampere/ A) for 1 bulb = 40/220................... For 4 bulbs = 4× 40/220( both 0's of numerator & denominator are cancelled)................. A= 4×4/22= 8/11= 0.7272 A or simply 0.72 A................ Flow in 4 bulbs= 8/11 so flow in 1 bulb = 8/11÷4= 0.18 A....