Electronic Principles
Current is

An imbalance of electrical charges
The force that causes electrons to flow
None of these
The flow of charged particles through a material
The number of free electrons in an atom

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Electronic Principles
In a pure inductor:

ac current lags the voltage by 90 degree
ac current is converted to dc voltage
ac current leads the voltage by 90 degree
None of these
ac current and voltage are exactly in phase

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Electronic Principles
Which one of the following statements applies to common, non-rechargeable flashlight batteries?

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

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