Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test Physics Thermodynamics Heat engines
The definition of a heat engine's efficiency is
1
net-work input / total heat output
2
total heat output / net-work input
3
Net-work output / total heat input
4
More than one of the above
5
None of the above