Question

Maximum fluctuation of energy is the
1. Sum of maximum and minimum energies
2. Difference between maximum and minimum energies
3. Ratio of maximum and minimum energies
4. Ratio of mean resisting torque to the work done per cycle

Answer 1

Correct Answer - Option 2 : Difference between maximum and minimum energies

Explanation:

Flywheel

• A flywheel is used to control the speed variation caused by the fluctuations of energy during each cycle of operation.
• It acts as a reservoir of energy that stores energy during the period when the supply of energy is more than the requirement and releases energy during the period when the supply of energy is less than the requirements.

The difference between the maximum and the minimum energies is known as a maximum fluctuation of energy.

ΔE = Emax - Emin

\(\begin{array}{l} {E_{max}} = {\left( {K.E} \right)_{max}} - {\left( {K.E} \right)_{min}}\\ = \frac{1}{2}I\left( {\omega _{max}^2 - \omega _{min}^2} \right) \end{array}\)

The difference between the maximum and minimum speeds during a cycle is called the maximum fluctuation of speed.

ΔN = Nmax - Nmin