The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K) ?

Related Mcqs:

The thickness of oxide film is y at time t. If K1, K2 and K3 are the temperature dependent constants, the parabolic law of oxidation is given by __________________?

A. y2 = 2k1t + k2 B. y = k1 ln (k2t + k3) C. y = k1 t + k2 D. y = k1t3 + k2...

Minimum number of members required to form a Public Limited Joint Stock Com-pany is___________________?

A. 7 B. 10 C. 12 D. 17...

Heat required to raise the temperature of a body by 1 °C is called its_______________?

A. Heat capacity B. Specific heat capacity C. Thermal conductivity D. Water equivalent...

Pick out the wrong statement about nucleate boiling ?

A. Bubble generation is by expansion of entrapped gas/vapour at small cavities in the surface B. Surface temperature is greater than the saturation temperature of the liquid C. Heat transfer from the surface of the liquid is less than that in film boiling D. The temperature is less than that of film boiling...

Brazing filler metal used for joining steel plates_________________?

A. Melts below the melting points of base metals B. Melts below 300°C C. Is copper phosphorous alloy D. Is copper...