Two lamps, one rated $100 W$ at $220 V$ , and the other $60 W$ at $220 V$ , are connected in parallel to electric mains supply. What current is drawn from the line if the supply voltage is $220 V$ ?

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Solution

Both lamps are connected in parallel potential difference= $220 V$
$P o w e r = V \times I$
$I = \frac{100}{200} + \frac{60}{220} = 0.727 A$

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Two lamps, one rated 100W at 220V, and the other 60W at 220V, are connected in parallel to electric mains supply. What current is drawn from the line if the supply voltage is 220V?

Both lamps are connected in parallel potential difference=220VPower=V×II=100200+60220=0.727A

Two lamps, one rated $100 W$ at $220 V$ , and the other $60 W$ at $220 V$ , are connected in parallel to electric mains supply. What current is drawn from the line if the supply voltage is $220 V$ ?

Both lamps are connected in parallel potential difference= $220 V$
$P o w e r = V \times I$
$I = \frac{100}{200} + \frac{60}{220} = 0.727 A$