Determine I and ZT for the circuit in Fig. 9.72.


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A solid-state, reduced voltage motor starter uses ____ controlled rectifiers for power control.

a. graphite b. silicon c. copper d. platinum

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Low-pressure refrigerant flows through the ____ to provide cooling for the motor of a hermetically sealed compressor.

A. valves B. rotor C. load D. stator winding

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The voltage across a 2-H inductor is 20(1 - e^-2t) V. If the initial current through the inductor is 0.3 A, find the current and the energy stored in the inductor at t = 1 s.

What will be an ideal response?

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How does air flow in a standing-pilot, natural-draft system?

A) It relies on heat to decrease the convection of the air to pull air into the combustion chamber and force flue-gases into the proper vent. B) It relies on a fan to pull the air into the combustion chamber and blow flue-gases out. C) It relies on heat to pull air into the combustion chamber and a fan to remove flue-gases. D) It relies on heat to increase the buoyancy of the air to pull air into the combustion chamber and force flue-gases into the proper vent.

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