Electrical Engineering MCQ
Advantage of per unit system as compare to absolute system:
- Calculation time is less
- Memory required is less
- Only one equation is required
- All of these
Correct answer: 4. All of these
Explanation: The application of per unit system reduces calculation time, it needs less memory and only one equation is required.
- Calculation Time is Less:
- In the per-unit system, quantities are expressed as a ratio or percentage of a base value, making calculations more straightforward and reducing the need for extensive arithmetic operations.
- This simplification leads to faster calculation times compared to the absolute system, where values are expressed in their actual physical units.
- Memory Required is Less:
- Per-unit values are dimensionless ratios, and calculations involve working with relative values rather than absolute physical units.
- As a result, the per-unit system requires less memory for storage and computation compared to the absolute system, where values are specified in various units (e.g., volts, amperes).
- Only One Equation is Required:
- The per-unit system allows expressing system parameters in a normalized form, and calculations involve simple multiplication and division operations.
- In many cases, a single set of equations can be used for analysis, simplifying the mathematical representation of the system. This is in contrast to the absolute system, where different equations may be needed for various units.