The element of heater is very hot while the wires carrying current are cold. Why?
If the length of the filament of a heater is reduced by 10% , the power of the heater will
If the length of the filament ofa heater is reduced by 10% the power of the heater will :
The element of an electric heater is in the form of a coil. Once it is heated by dc volatage and then by ac voltage of equal potential difference. Will the production of heat in both cases be same of different?
An electric heater ofpower 1kW emits thermal radiations the surface area of heating element of heater is 200 cm^(2) . If this heating element is treated like a black bodyfind the temperature at its surface. Assume its temperature is very much higher then its surroundings.
(a) Of which material is a fuse-wire made of ? (b) Of which material is the element of an electric heater made of ?
How much energy is consumed when a current of 5 amperes flows through the filament (or element) of a heater having resistance of 100 ohms for two hours? Express it in joules.
The coil of a heater is cut into two cqual halves and only one of them is used in the heater. The ratio of the heat produced by this half of the coil to that produced by the original coil is
BEIITIANS-ELECTRIC CURRENT AND ITS EFFECTS-IIT JEE WORKSHEET (V. Matrix Matching)
