Electronic Principles
The direction of conventional current flow is:

from left to right
None of these
from negative to positive
from neutral to positive
from positive to negative

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Electronic Principles
What is a free electron?

An electron that has no electrical charge
An electron that has twice the amount of charge of a normal electron
An electron that has been freed from its parent atom
None of these
An electron that costs nothing

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Electronic Principles
Which one of the following is a direct statement of Ohm's law?

The algebraic sum of currents entering and leaving a point is equal to zero
The voltage drop across a resistance is proportional to the value of resistance and the amount of current flowing through it
The algebraic sum of voltages in a loop is equal to zero
None of these
The total resistance of a parallel circuit is less than the value of the smallest resistance

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

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

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