name a substance whose resistance almost remains unchanged by increasing of temperature and name two special characteristics of heater coil
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the resistance of alloys like german-silver, magnanin, constantan, practically does not change with rise in temperature
High melting point- so that it can perfectly withstand highest temperature and with the increase in temperature, it might will not melt down the coil or heating element. High specific resistance- this requires small length of the wires to provide same quantity of heat to the appliance
High melting point- so that it can perfectly withstand highest temperature and with the increase in temperature, it might will not melt down the coil or heating element. High specific resistance- this requires small length of the wires to provide same quantity of heat to the appliance
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