Shortcut Methods
Shortcut methods and tricks for numerical:
Numerical 1: Step-Up Transformer
Shortcut method:
- The current ratio of a transformer is inversely proportional to the turns ratio.
- In this case, the turns ratio is 2000 / 1000 = 2.
- Therefore, the current ratio is 1 / 2.
Numerical 2: Step-Down Transformer
Shortcut method:
- The efficiency of a transformer is the ratio of the power output to the power input.
- In this case, the efficiency is 90%, which means that 10% of the power is lost.
- Therefore, the power loss is 10% of 220 W = 22 W.
Numerical 3: Transformer Turns Ratio
Shortcut method:
- The turns ratio of a transformer is directly proportional to the voltage ratio.
- In this case, the voltage ratio is 240 V / 120 V = 2.
- Therefore, the turns ratio is 2.
