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two lamps one rated 100w at 220v and other 60w at 220v are connected in parallel to electric main supply . what current is drawn from the line if the supply voltage is 220v ? |
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Answer» tion:POWER = P = 100 WVoltage = V = 220vResistance = RP = V²/R100 = 220 ×220/RR = 220 × 220/100 = 484 Ω==========================Power = P = 60 WVoltage = V = 220vResistance = RP = V²/R60 = 220 × 220/RR = 220× 220/60 = 806.7 Ω=========================As the RESISTORS are CONNECTED in parallel , total RESISTANCE = 1/R1/R = 1/484 + 1/806.7 = 806.7 + 484/484×806.7 = 1290.7/390442.8R = 390442.8/ 1290.7 = 302.5 ohms Total resistance = 302.5 ΩI = currentV = IR220 = I × 302.5I = 220/302.5 = 0.73 AThe current drawn is 0.73 ARead more on Brainly.in - brainly.in/question/1295223#readmore |
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