The temperature coefficient of resistance of a wire is `0.00145^(@)C^(-1)`. At `100^(@)C` its resistance is `2Omega`. At what temperature the resistance of the wire be `3Omega`?

Temperature coefficient of resistance of a wire at 0^(@)C is 0.00125^(@)C^(-1) . At 25^(@)C its resistance is 1 Omega . The resitance of the wire will be 1.2 Omega at

The temperature coefficient of resistance of the material of a wire is 0.00125^(@)C^(-1) . Its resistance at 27^(@)C is 1 Omega . At what temperature will its resistance be 2 Omega ?

The temperature coefficient of resistance of a wire is 0.00125 per ""^(@)C . At 300 K, its resistance is 1Omega . The resistance of the wire will be 2Omega at

The resistance of a wire at 20^(@)C is 20Omega and at 500^(@)C is 60Omega . At which temperature its resistance will be 25Omega ?

A platinum resistance thermometer reads 0^@ C when its resistance is 80 Omega and 100^@ C when its resistance is 90 Omega . Find the temperature at which the resistance is 86 Omega .

The temperature coefficient of resistance for two material A and B are 0.0031^(@)C^(-1) and 0.0068^(@)C^(-1) respectively .Two resistance R_(1) and R_(2) made from material A and B respectively . Have resistance of 200 Omega and 100 Omega at 0^(@)C . Show as a diagram the colour cube of a carbon resistance that would have a resistance equal to the series combination of R_(1) and R_(2) at a temperature of 100^(@)C (Neglect the ring corresponding to the tolerance of the carbon resistor)

A copper coil has resistance of 20.0 Omega at 0^@C and a resistance of 26.4 Omega at 80^@C . Find the temperature coefficient of resistance of copper.

The electrical resistance of pure platinum increases linearly with increasing temperature over a small range of temperature . This property is used in a Platinum resistance thermometer. The relation between R_(theta) (Resistance at theta K) and R_(0) (Resistance at theta_(0)K ) is given by R_(theta)=R_(0)[1+a(theta-theta_(0))] , where alpha= temperature coefficient of resistance. Now, if a Platinum resistance thermometer reads 0^(@)C when its resistance is 80Omega and 100^(@)C when its resistance is 90 Omega find the temperature at which its resistance is 86Omega .

Two equal resistance at 0^(@)C with temperature coefficient of resistance alpha_(1) and alpha_(2) joined in series act as a single resistance in a circuit the temperature coefficient of their single resistance will be

The temperature coefficient of resistance of tungsten is 4.5 xx 10^(-3) ""^(@)C^(-1) and that of germanium is - 5 xx 10^(-2)""^(@)C^(-1) . A tungsten wire of resistance 100 Omega is connected in series with a germanium wire of resistance R. The value of R for which the resistance of combination does not change with temperature is .