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

Hysteresis is most apparent when a steady amount of current is lowing through the coil of an electromagnet
Hysteresis is most apparent when the current through the coil of an electromagnet changes frequently
Hysteresis is most apparent when the core material is saturated
None of these
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 applies to common, non-rechargeable flashlight batteries?

Common flashlight batteries are secondary wet-cell batteries
None of these
Common flashlight batteries are primary dry-cell batteries
Common flashlight batteries are primary wet-cell batteries
Common flashlight batteries are secondary dry-cell batteries

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Electronic Principles
The total impedance of a parallel RLC circuit:

always increases as the applied frequency increases
is equal to the sum of the values of resistance, inductive reactance and capacitive reactance
is maximum at the resonant frequency
None of these
always decreases as the applied frequency increases

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