A Carnot Engine Operates Between Two Reservoirs with Unknown Temperatures $67 \%$

question 34

Multiple Choice

A Carnot engine operates between two reservoirs with unknown temperatures.If the Carnot engine operates at $67 \%$ efficiency,what is the ratio of the absolute temperatures of the reservoirs,T_c/T_h?

• A)0.33
• B)0.0012
• C)0.0025
• D)0.67

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Definitions:

AC Line

A conductor or conductors that carry alternating current (AC) electricity from the power source to the load.

Demagnetized

The state of a magnetic material where it has lost its magnetization, either partially or completely.

Magnetomotive Force

The force that drives magnetic flux through a magnetic circuit, analogous to voltage in an electrical circuit.

Magnetic Field

A vector field surrounding magnets and electric currents, which exerts a force on other magnets, currents, or magnetic materials.