The efficiency of energy conversion on the energy flow th...
The efficiency of energy conversion on the energy flow through a hydroelectric power is?
E1E2
E3E2
E2E1+ E2
E2E3 + E1
Correct answer is B
Efficiency = useful energy output from machineenergy input into machine
= E3E2
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In the diagram above, the direction of the force between N and S in the magnetic field is ...
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