A silver wire has a resistance of `2.1 Omega at 27.5 ^(@)C.` and a rsistance of `2.7 Omega at 100 ^(@)C.` Determine the temperature coefficient of resistivity of silver.

A silver wire has a resistance of 2.1 Omega at 27.5^(@) C and a resistance of 2.8 Omega at 100^(@) C . Determine the temperature coefficient of resistivity of silver.

A sample of water from a large swimming pool has a resistance of 9200 Omega at 25^(@)C when placed in a certain conductance cell. When filled with 0.02M KCI solution the cell has a resistance of 85 Omega at 25^(@)C. 500g of NaCI were dissolved in the pool, which was throughly stirred. A sample of this solution gave a resistance of 7600 Omega . calculate the volume of water in the pool. Given: Molar conductance of NaCI at that concentration is 126.5 Omega^(-1) cm^(2) mol^(-1) and molar conductivity of KCI at 0.02M is 138 Omega^(-1) cm^(2) mol^(-1) .

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).

In a series D.C. circuit has core of a reactance of 8Omega and a resistance of 6Omega . The effective resistance of the circuit will be …..

For half wave rectifier if load resistance R_(d) is 2 k Omega and P-N junction resistance R_(L) is 2 k Omega determine rectification efficiency.

An electric toaster uses nichrome for its heating element. When a negligibly small current passes 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 2.68 A. 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) .

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).

Resistance of a resistor wire is 5 Omega " at " 50" "^(@)C and 6 Omega " at " 100 " "^(@)C , then its resistance at 0" "^(@) C will be .... .

At room temperature (28.0^(@) C) the resistance of a heating element is 100 Omega . What ic. 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) .

Two wires of resistance R_(1) and R_(2) have temperature coefficient of resistance alpha_(1) and alpha_(2) respectively. These are joined in series. The effective temperature coefficient of resistance is