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)

ANS:A - T

The ratio of thermal conductivity (�κ) to electrical conductivity (�σ) is described by the Wiedemann-Franz law, which states that at a given temperature, this ratio is proportional to the temperature (T). Mathematically, the Wiedemann-Franz law can be expressed as: ��=��σκ​=LT Where:

• κ is the thermal conductivity,
• σ is the electrical conductivity,
• L is the Lorenz number, which is a constant, and
• T is the absolute temperature (in Kelvin).