Current Electricity and Electrical InstrumentEasy
Question
At what temperature will the resistance of a copper wire become three times its value at 0o C [Temperature coefficient of resistance for copper = 4 × 10-3 per oC] : -
Options
A.400o C
B.450o C
C.500o C
D.500o C
Topic: Current Electricity and Electrical Instrument·Practice all Current Electricity and Electrical Instrument questions
More Current Electricity and Electrical Instrument Questions
Four wire of the same diameter are connected in turn between two points, maintained at a constant difference. Their resi...A battery of internal resistance 2W is connected to a variable resistor whose value can vary from 4W to 10 W. The resist...The resistance of wire is 20 ohm. The wire is stretched to three times of its length.. Then the resistance will be :-...A 220 volt, 1000 watt bulb is connected across a 110 volt mains supply. The power consumed will be...A piece of copper is to be shaped so as to have a minimum resistance. Its length and cross-sectional area should be :-...