A heating element using nichrome connected to a 230V supply draws an initial current of 3.2 A which settles after a few seconds to steady value of 2.8 A. What is the steady temperature of the heating element if room temperature is `27.0^(@)C`? Temperature coefficient of resistance of nichrome averaged over the temperature range involved is`1.70xx10_(-4)`

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.

A blackbody of surface area 10cm^(2) is heated to 127^(@)C and is suspended in a room at temperature 27^(@)C calculate the initial rate of loss of heat from the body to the room.

An electric heater of resistance 10Omega connected to 220 V power supply is immersed in the water of 1 kg. How long the electrical heater has to be switched on to increase its temperature from 30^(@)C to 60^(@)C . (The specific heat of water is s=4200J kg^(-1) /C )

A body which absorbs heat of 2,55,000 J with a mass of 10,000 g . The specific heat capacity of the body is 4.18 J / g°C . What is the change in temperature of the body ?

A circuit containing a 80 mH inductor and a 60muF capacitor in series is connected to a 230 V, 50 Hz supply. The resistance of the circuit is negligible. a. Obtain the current amplitude and rms values. b. Obtain the rms values of potential drops across each element. c. What is the average power transferred to the inductor? d. What is the average power transferred to the capacitor? e. What is the total average power absorbed by the circuit? ['Average' implies "averaged over one cycle'.]

An ideal gas at a pressures of 1 atmosphere and temperature of 27°C is compressed adiabatically until its pressure becomes 8 times the initial pressure. Then, the final temperature is (Take, gamma = 3/2).

Calculate the amount of heat radiated per second by a body of surface area 12cm^(2) kept in thermal equilibrium in a room at temperature 20^(@)C The emissivity of the surface =0.80 and sigma=6.0xx10^(-s)Wm^(-2)K^(-4) .

A aluminum can of cylindrical shape contains 500cm^3 of water. The area of the inner cross section of the can is 125cm^2 . All measurements refer to 10^@C . Find the rise in the water level if the temperature increases to 80^@C . The coefficient of linear expansion of aluminum =23 xx 10^(-6)C^(-1) and the average coefficient of volume expansion of water= 3.2xx10^(-4)C^(-1) respectively.