AIIMS 2018 Physics Thermal Conductivity MCQ Question

The unit of thermal conductivity, expressed as J m⁻¹ s⁻¹ (°C)⁻¹, can be derived from its fundamental components: J (joules) represents energy, m (meters) indicates distance, s (seconds) denotes time, and °C (degrees Celsius) refers to temperature difference. This unit signifies the amount of heat (energy) transferred through a material per unit distance per unit time for a temperature gradient, making it a measure of how well a material conducts heat. Other options are not relevant as they do not provide valid units or concepts related to thermal conductivity, thereby failing to represent the physical principles involved.