A Carnot's engine working between $400\, K$ and $800\, K$ has a work output of $1200\, J$ per cycle. The amount of heat energy supplied to the engine from the source in each cycle is ........... $J$
  • A$3200$
  • B$1800$
  • C$1600$
  • D$2400$
JEE MAIN 2021, Medium
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