You have two electric lamps. The printed specifications on them are 40W,
220V and 100W, 220 V. Calculate the current and resistance of each lamp
when put in a circuit of 220 V supply line.
Answers
Answered by
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Explanation ⇒ For Bubl 1,
P = 40 W, V = 220 V.
Using the formula,
Current = Power/Voltage.
∴ Current = 40/220
∴ Current = 0.18 A.
Resistance = (V)²/P
∴ R = 220 × 220/40
R = 1210 Ω
Now,
For Bulb 2,
P = 100 W
V = 220 V.
Thus, Current = P/V
∴ i = 100/220
∴ i = 0.45 A.
Also, Resistance = (V)²/P
Resistance = (220)²/100
∴ R = 484 Ω
Hope it helps.
Answered by
2
Answer:
For Bubl 1,
P = 40 W, V = 220 V.
Using the formula,
Current = Power/Voltage.
∴ Current = 40/220
∴ Current = 0.18 A.
Resistance = (V)²/P
∴ R = 220 × 220/40
R = 1210 Ω
Now,
For Bulb 2,
P = 100 W
V = 220 V.
Thus, Current = P/V
∴ i = 100/220
∴ i = 0.45 A.
Also, Resistance = (V)²/P
Resistance = (220)²/100
∴ R = 484 Ω
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