A heating element using nichrome connected to a 230V supply draws an inital 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 eleipent if the room temperature is `27.0^@C`? Temperature coefficient of resistivity of nichrome averaged over the temperature range involved is `1.70xx l0^(-4)//C^@`.

A heating element using nichrome connected to a 230 V supply draws an initial current of 3.2A which settles after a few seconds to a steady value of 2.8A. What is the stready temperature of the heating element if the room temperature is 27^@C ? Temperature coefficient of resistance of nichrome averages over the temperature range involved is 1.70times10^(-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 75.3Omega When the toaster is connected to a 230V 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 averaged over the temperature range involved, is 1.70xx10^(-4)//C^@

At what temperature the resistance of a copper wire will become three times its value at 0^@C ? Temperature coefficient of resistance for copper 4xx10^(-3)//C

It is given that the specific heat of water in cal.g^(-1) unit is s=0.6t^(2) , where t is the temperature in Celsius scale. what amount of heat is required to raise the temperature of 10g water from 0^(@)C to 10^(@)C ?

The temperature coefficient of resistance for the material of a conductor is 38 times 10^(-4^@)C^-1 .What will be its value i n^@F^-1 ? Range of rise in temperature can be assumed small.

The resistance R of a conducting wire depends on its material , length l and area of cross section A. The resistivity of the material of the wire is rho=(RA)l the value of rho is for different materials .It is very low for conducting materials like metals,Besides, the resistance of a conductor also depends on its temperature. IF the resistance of a conductor is R_0 at 0^@C and R_1 at t^@C , then R_1=R_0(1+at) where a is called the temperature coefficient of resistance. The resistance increases with temperature for metallic conductors but decreases for graphite,a few metal alloys,and for semiconductors like silicon and germanium. The resistance of a metal wire increases by 10% when its temperature rises from 10^@C to 110^@C .The temperature coefficient of resistance of the metal is

For the reaction at 298K 2A+B to C triangleH = 400 kJ mol^-1, triangleS = 0.2 kJ K^-1 mol^-1 At what temperature will the reaction become spontaneous considering triangleH & triangleS to be constant over the temperature range.

A copper block of mass 2.5 kg is heated in a furnace to a temperature of 500^@C and then placed on a large ice block. What is the maximum amount of ice that can melt? Specific heat of copper is 0.39 J gm^-1 "^@C^-1 , Heat of fusion of ice = 335 J gm^-1 .