7.3 - EV Charging Calculation
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Practice Questions
Test your understanding with targeted questions
Calculate the current required for a 5 kW charger at 230 V.
💡 Hint: Use the formula I = P/V.
What is the resistance if a cable loses 10 W of power at 5 A?
💡 Hint: Use P = I²R to find R.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is the current in amperes drawn by a 7 kW charger at 230 V?
💡 Hint: Think about the relationship between power, voltage, and current.
True or False: Power loss increases with the square of the current.
💡 Hint: Remember the formula for power loss.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
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.
💡 Hint: Keep in mind voltage and charging power calculations.
Calculate the total power loss during a 45-minute charge using a 16 mm² cable rated for 20 m at a resistance of 0.0025 Ω/m, with a charging current of 20 A.
💡 Hint: Determine the resistance first before calculating power loss.
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