Electronic Principles
Which one of the following kinds of materials has the highest permeability?

A ferromagnetic material
A paramagnetic material
None of these
A diamagnetic material
All of these

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Electronic Principles
Current is

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

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

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

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