All core subjects 2026 — Question Paper
AI-generated illustrated lesson. Hand-drawn and narrated, step by step.
QJEE-P10
Did you know even a theoretically perfect engine is forced to waste energy? Meet the Carnot engine. It operates by taking heat from a hot source, doing some useful work, and dumping the leftover heat into a cold sink.
In our problem, this engine is operating between two specific temperatures. The hot source is at 400 Kelvin, and the cold sink is at 300 Kelvin.
To find the absolute maximum efficiency possible, we use the Carnot formula. It's simply one minus the ratio of the cold temperature to the hot temperature.
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