Electronic Principles
A circuit has two different voltage sources that are connected in a series-opposing form. If the sources are rated at 6 V and 9 V, what is the total source voltage?

16 V
7.5 V
3 V
8 V
None of these

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Electronic Principles
Which one of the following statements best describes magnetic hysteresis?

None of these
Hysteresis is most apparent when the core material is saturated
Hysteresis is most apparent when the current through the coil of an electromagnet changes frequently
Hysteresis is most apparent when a steady amount of current is lowing through the coil of an electromagnet
Hysteresis is the amount of magnetic flux that is not confined to the core material of an electromagnet

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Electronic Principles
Which one of the following statements most accurately describes the nature of inductive reactance?

Inductive reactance is an opposition to current flow in ac circuits
Inductive reactance is an opposition to current flow in dc circuits
Inductive reactance is a force that tends to overcome the effects of counter emf
Inductive reactance is another term for counter emf
None of these

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Electronic Principles
Which one of the following statements is true for the voltage in a parallel RL circuit?

The total voltages is less than the sum of the voltages across the resistance and inductance
None of these
The total voltage is equal to the sum of the voltages across the resistance and inductance
The total voltage lags the total current by less than 90
The voltage always has the same amplitude and phase for every part of the circuit

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