Physics - A sum on electric heater. I want to know they process to solve it?
A heater is designed to operate with a power of 44W in a 220V line. A resistance r is connected in parallel with it and the combination is connected i
A heater is designed to operate with a power of 44W in a 220V line. A resistance 'r' is connected in parallel with it and the combination is connected in series with a resistance of 11ohm to a 220V mains. What should be the value of 'r' so that the heater can operate with a power of 110W?
or:A heater is designed to operate with a power of 44W in a 220V line. A resistance 'r' is connected in parallel with it and the combination is connected in series with a resistance of 11ohm to a 220V mains. What should be the value of 'r' so that the heater can operate with a power of 110W?
or:An electric heater is made of tungsten. Resistance and current vary wildly with changes in temperature. For instance when you first plug it in it draws about ten times its normal operating current until it warms up. If you take a heater designed to run on a lower voltage, you know the approximate current it draws, so it is possible to calculate a resistance to operate it from a higher voltage source. But it is only by experimentation that you can get a desired power from a lower voltage.I think you meant 110v instead of 110W. We customarily use lower case letters to indicate ac values and upper case letters to indicate DC values. And it is quite difficult to get 110W out of a 44W element. You just can not stand spelling mistrakes in this business.Here is a free course in basic electronics: www.phy.davidson.edu/instrumentation/NEETS.htm
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