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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the relationship between phase current and line current in a star connection?
💡 Hint: Think specifically about how current flows in a star configuration.
Question 2
Easy
If the phase voltage is 400 V, what is the line voltage?
💡 Hint: Use the relationship we discussed.
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 formula for calculating line voltage in a star connection?
- VL = √3 × Vph
- VL = Vph × 3
- VL = Vph / √3
💡 Hint: Remember how these two voltages relate in three-phase systems.
Question 2
In a star connection, what is the relationship between line current and phase current?
- True
- False
💡 Hint: This relationship is fundamental to understanding current flow.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A star-connected load has a phase current of 20 A and a phase voltage of 400 V. Compute the line voltage, line current, total power in the system considering the power factor is 0.9.
💡 Hint: Use the relationship between line and phase parameters to find total power.
Question 2
If the line voltage of a balanced star-connected system is 480 V and the line current is 30 A, what is the phase voltage, the phase current, and the total real power if the power factor is 0.95?
💡 Hint: Calculate phase voltage first using the inverse of the line voltage relationship.
Challenge and get performance evaluation