Question
The coil of a heater is cut into two equal halves and only one of them is used into heater. What is the ratio of the heat produced by this half coil to that by the original coil?
Solution
Let, the resistance of the coil be R.
Therefore, the resistance of half part of a coil = R/2
Heat produced by half coil,
Original heat produced,
Therefore, the ratio of heat produced by half coil to that by original coil is,
Therefore, the resistance of half part of a coil = R/2
Heat produced by half coil,
Original heat produced,
Therefore, the ratio of heat produced by half coil to that by original coil is,
