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

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).

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).

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) .

A hole is drilled in a copper sheet. The diameter of the hole is 4.24 " cm at " 27.0 ^(@) C . What is the change in the diameter of the hole when the sheet is heated to 227^(@) C ? Coefficient of Imear expansion of copper = 1.70 xx 10^(-5) K^(-1) .

A hole is drilled in a copper sheet. The diameter of the hole is 4.24 cm at 27.0^(@)C . What is the change in the diameter of the hole when the sheet is heated to 227^(@)C ? Coefficient of linear expansion of copper =1.70xx10^(-5)K^(-1) .

A dry cell of emf 1.5V and internal resistance 0.10 Omega is connected across a resistor in series with a very low resistance ammeter: When the circuit is switched on, the ammter reading settles to a steady value of 2.0A. What is the steady (a) rate of chemical energy consumption of the cell, (b) rate of energy dissipation inside the cell, (c) rate of energy dissipation inside the resistor, (d) power output of the source?

What amount of heat must be supplied to 2.0 xx 10^(-2) kg of nitrogen (at room temperature ) to raise the temperature by 45^(@)C at constant pressure. Molecular mass of N_(2) = 28 , R= 8.3 J "mol"^(-1) K^(-1) .

A steel rular exactly 20 cm long is graduated to give correct measurements at 20^@C . (a) Will it give readings that are too long or too short at lower temperatures? (b) What will be that actual length of the rular when it is used in the desert at a temperature of 40^@ C ? alpha_(steel = 1.2 xx 10^-5(.^@ C)^-1 .

At 4^(@)C, 0.98 of the volume of a body is immersed in water. The temperature at which the entire body gets immersed in water is (neglect the expansion of the body ) ( gamma_(w) = 3.3 xx10 ^(-4)K^(-1) ):-