Chapter 37, Problem 50A

What is wrong with this scheme? To generate electricity without fuel, arrange a motor to run a generator that will produce electricity that is stepped up with transformers so that the generator can run the motor and simultaneously furnish electricity for other uses.

To determine

To explain: issue with the scheme of generating the electricity without fuel, arranging a motor to run a generator that produces electricity

Explanation of Solution

Introduction:  Energy can be transferred from one form to another form but $100\%$ energy cannot. Because any engine/machine/motor does not give $100\%$ efficiency always there is some loss in transferring the energy.

Explanation:  Changing the voltage cannot change the amount of energy produced by the generator. The concept of the question is violating the law of conservation of energy.

According to II law of thermodynamics, any engine does not give $100\%$ efficiency. Always there is some loss. The generator produces less electric power than the actual and the transformer will not step-up voltage and current simultaneously.

Conclusion:  The idea of power generation in the question violating the law of conservation of energy.