If the temperature of an object increases, what happens to the rate of heat radi

Practice Questions

Q1
If the temperature of an object increases, what happens to the rate of heat radiation from that object?
  1. Decreases
  2. Increases
  3. Remains constant
  4. Becomes zero

Questions & Step-by-Step Solutions

If the temperature of an object increases, what happens to the rate of heat radiation from that object?
Correct Answer: Rate of heat radiation increases.
  • Step 1: Understand that heat radiation is the energy emitted by an object in the form of infrared radiation.
  • Step 2: Know that the temperature of an object is a measure of how hot it is.
  • Step 3: Learn about the Stefan-Boltzmann law, which states that the amount of heat radiation emitted by an object increases with temperature.
  • Step 4: Realize that the rate of heat radiation increases not just a little, but by a factor related to the fourth power of the temperature (meaning if the temperature doubles, the radiation increases by 16 times).
  • Step 5: Conclude that as the temperature of an object increases, the rate at which it radiates heat also increases significantly.
  • Stefan-Boltzmann Law – The law states that the total energy radiated per unit surface area of a black body is proportional to the fourth power of the black body's absolute temperature.
  • Heat Radiation – The process by which heat energy is emitted from an object in the form of electromagnetic waves.
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