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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is one advantage of three-phase systems over single-phase?
💡 Hint: Think about cost and efficiency.
Question 2
Easy
What is the phase-shift between the voltages in a three-phase system?
💡 Hint: How many phases do we have in a three-phase system?
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the primary advantage of three-phase systems?
- Higher conductor material use
- Constant power delivery
- Lower efficiency
💡 Hint: Consider how power delivery affects motor operations.
Question 2
True or False: In a Delta connection, line current is equal to phase current.
- True
- False
💡 Hint: Think about how the current flows in each configuration.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A balanced star-connected load draws 20 kW and has a power factor of 0.9. If the line voltage is 400 V, calculate the line current and verify the apparent power calculated.
💡 Hint: Remember the relation S = P / PF.
Question 2
In a delta connection with a phase voltage of 230 V, the line current is 40 A. Determine the total real power delivered to the load and its apparent power.
💡 Hint: Convert phase measurements to line for calculations.
Challenge and get performance evaluation