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theLitclieenergydrawnbythekettle1240 k.J]raws an energy of 45 kJ in 4 minutes, when the current flowing through its element15.2 Ί!in kilojoules.2. A soldering rod dis 6 A. Calculate the resistance of its heating element. |
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Answer» t=240s A=6 H=45000 H=I2Rt 45000=36 x R x 240 R=5.20 |
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