18 Questions
What is the characteristic of an ideal inductor?
It contains only inductance and no resistance
How is the instantaneous power graph of an ideal inductor obtained?
By multiplying the instantaneous voltage and current
What is the frequency of the instantaneous power curve compared to the current and voltage waveforms?
Twice the frequency
What is the average value of the instantaneous power curve over one complete cycle of the input voltage?
Zero
What happens when a negative instantaneous voltage is multiplied by a positive instantaneous current?
The resulting instantaneous power is negative
What can be said about the positive and negative power areas under the instantaneous power curve?
The positive and negative power areas are equal
What does the positive portion of the power curve represent?
Energy delivered from the source to the inductor
What happens to the energy stored in the inductor when its magnetic field collapses?
It is returned to the source
What is the average true power in a purely inductive circuit?
Zero
What is the power initially used by the inductor referred to as?
Reactive power
Why must the source be capable of delivering power for a quarter cycle?
To deliver power for the positive half cycle
What would happen to an ideal inductor if it were connected to a circuit?
It would never become warm as there is no true power dissipated
What is the direction of the induced voltage across the inductor when the switch is closed?
Opposite to the applied voltage
What happens to the current flowing in the circuit after five time constants?
It reaches a maximum
What is the role of the inductor when the switch is changed to position B-C?
It acts as a power source
What happens to the energy stored in the inductor after five time constants?
It is fully dissipated as heat
What is the direction of the current flowing through the resistor when the switch is changed to position B-C?
The same as the normal circuit current
What is the state of the inductor after five time constants when the switch is changed to position B-C?
It has no energy remaining
Learn about the power curve of an inductor, how it builds a magnetic field and alternates between consuming and supplying power. Understand the ideal inductor's power supply and curve characteristics.
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