Question
CCEA Unit 2 Paper
A power station generates electricity at 25 kV. A step-up transformer increases the voltage to 400 kV for transmission through cables with a total resistance of 10 Ω.
(a) If the power transmitted is 800 MW, calculate the current in the transmission cables. (3 marks) (b) Calculate the power lost in the cables. (2 marks) (c) Explain why transmission at high voltage reduces power losses. (3 marks)
8 marks · take your time before peeking.
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Generated by TopMyGrade AI · cross-check official sources before relying on the mark-scheme phrasing.