At room temperature `(27.0^(@)C)` the resistance of a heating element is `100 Omega.` What is the temperature of the element if the resistance is found to be `117 Omega. `given that the temperature coefficient of the material of the resistor is `1.70 xx 10 ^(-4)"" ^(@)C^(-1).`

What is the source temperature of the Carnot engine required to get 70% efficiency? Given sink temperature = 27^(@)C

An electric toaster uses nichrome for its heating element. When a negllgibly small current pases through it, its resistance at room temperature (27.0^(@)C) is found to be 75.3 Omega. When the toaster is connected to a 230 V supply, the current settles, after a few seconds, to a steady value of 2.68A. What is the steady temperature of the nichrome element ? The temperature coefficient of resistance of nichrome averaged over the temperature range involved is 1.70 xx 10 ^(-4)"" ^(@)C ^(-1).

A heating element using nichrome connected to a 230V supply draws an initial current of 3.2A which settles after a few seconds to a steady value of 2.8A. What is the steady temperature of the heating -element, if the room temperature is 27.0^(@) C? Temperature cofficient of resistance of nichrome averaged over the temperature range involved is 1.70xx 10^(-4@)C^(-1).

The resistance of a wire at 300 K is found to be 0.3Omega . If the temperature co-efficent of resistance of wire is 1.5xx10^(-3)K^(-1) , the temperature at which the resistance becomes 0.6Omega is

Resistance of a coil is 4.2 Omega at 100^@C and the temperature coefficient of resistance of its material is 0.004//"^@C . Then its resistance at 0^@C is ( Omega )

A steel tape Im long is correctly calibrated for a temperature of 27.0 ^(@) C . The length of a steel rod measured by this tape is found to be 63.0 cm on a hot day when the temperature is 45.0^(@) C .What is the actual length of the steel rod on that day? What is the length of the same steel rod on a day when the temperature is 27.0^(@) C ? Coefficient of linear expansion of steel = 1.20 xx 10^(-5) K^(-1) .