Which of the following is also called the First Law of Thermodynamics?
Law of Conservation of Energy
The correct answer is the law of conservation of energy.
- The law of conservation of energy is also referred to as the first law of thermodynamics.
- The first law of thermodynamics states that the energy of the universe is constant.
- However, while it can be exchanged between the system and the surroundings, it cannot be created or destroyed.
- The law essentially relates to changes in energy fields due to work and heat transfer.
- The total energy of a system remains conserved.
- The equation for the first law of thermodynamics is as follows:
- ΔU = q + W
- Where,
- ΔU = change in internal energy of the system
- q = algebraic sum of heat transfer between the system and the surroundings
- W = work done by the system interacting with its surroundings
Important Questions from Work Power Energy
A microphone converts:
Select the most appropriate option to fill in the blanks. A thermistor can have a region of _______ determined by the construction material or the temperature of the material. The change in temperature can be due to internal effects such as current through the thermistor or due to external effects of _____.
EMF of a thermocouple is approximately a _____ function of the temperature difference between the junctions.
A particle of mass m starts from rest and moves with a constant acceleration a along a straight line. What is the relationship between the distance travelled x and the kinetic energy K of the particle?
A machine performs work W in time t, and its power output is P. If the machine’s power output is doubled, how much time will it take to perform the same amount of work?
