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

None of these
nicad cell
piezoelectric device
photodiode
solar cell

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Electronic Principles
One henry of inductance is defined as:

the amount of counter emf required to reduce a current to 1 A
the amount of inductance required for generating 1 V of counter emf when the current changes at the rate of 1 A per second
None of these
the amount of inductance required to change the frequency of a current by 1 Hz
the number of turns of wire in an inductor multiplied by the amount of current flowing through it

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Electronic Principles
Molecule is

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

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