Author: Study Clue

What is the purpose of using a laminated core in transformers? A Increase voltage B Decrease impedance C Reduce eddy

What is the primary function of an isolation transformer? A Increase voltage B Provide isolation C Control temperature D Reduce

What is the primary purpose of insulation testing in transformers? A Check insulation integrity B Test voltage C Measure resistance

What is the primary cause of magnetizing current in a transformer? A Voltage imbalance B High frequency C Magnetic flux

What is the main purpose of cooling in transformers? A Increase voltage B Reduce size C Prevent overheating D Increase

What is the main purpose of using a laminated core in transformers? A Lower resistance B Reduce losses C Improve

What does a transformer change in an electrical system? A Frequency B Voltage C Power D Current Explanation A transformer

What is the primary purpose of braking methods in electrical machines? A Increase speed B Stop quickly C Increase torque

How does an increase in temperature affect the resistance of an electrical machine’s windings? A Fluctuates B Increases resistance C

What is the primary function of the commutator in a DC motor? A Reverse current direction B Increase torque C