Electronic Principles
A device that converts mechanical pressure to electrical energy is called a:

photodiode
None of these
solar cell
piezoelectric device
nicad cell

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Electronic Principles
Molecule is

A atom that has a shortage of electrons in its outer orbit
A atom that flows whenever there is an imbalance of electrical charges between two points
The smallest particle of a substance that retains the properties of that substance
None of these
A atom that has an excessive number of electrons in its outer orbit

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

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