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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Calculate the current required for a 5 kW charger at 230 V.
π‘ Hint: Use the formula I = P/V.
Question 2
Easy
What is the resistance if a cable loses 10 W of power at 5 A?
π‘ Hint: Use P = IΒ²R to find R.
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 current in amperes drawn by a 7 kW charger at 230 V?
π‘ Hint: Think about the relationship between power, voltage, and current.
Question 2
True or False: Power loss increases with the square of the current.
- True
- False
π‘ Hint: Remember the formula for power loss.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
An EV charger operates at 22 kW on a 400V supply. Determine the current drawn and select an appropriate cable if the standard rating is at least 125% of that current.
π‘ Hint: Keep in mind voltage and charging power calculations.
Question 2
Calculate the total power loss during a 45-minute charge using a 16 mmΒ² cable rated for 20 m at a resistance of 0.0025 Ξ©/m, with a charging current of 20 A.
π‘ Hint: Determine the resistance first before calculating power loss.
Challenge and get performance evaluation