TWO SOLDERING IRON ARE WORKING IN 250V.THE RESISTANCE OF ONE IS 500OHM AND THAT OF ANOTHER IS 750 OHM.AMONG THESE WHICH ONE HAS LARGER INTENSITY OF CURRENT?WHICH SOLDERING IRON HAS MORE POWER ?CALCULATE THE ENERGY CONSUMED IN UNITS WHEN A SOLDERING IRON OF 500 OHM WORKS FOR 2 HOURS?CALCULATE HEAT PRODUCED IN 5 MINUTES BY THE SOLDERING IRON HAVING THE RESISTANCE 750 OHM?

Intensity of current will be higher in the 500 ohm and power of 500 ohm soldering iron more than 750 ohm soldering iron.The energy consumed by 500 ohm soldering iron working for 2 hours=V2R×t=250×250×2500=250 W h=0.25KWh=0.25 U.The energy consumed by 750 ohm soldering iron working for 5 minuts or 560h=V2R×t=250×250×5750×60=125'187Wh=0.007 KWh=0.007 U.

  • 0
What are you looking for?