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

None of these
solar cell
piezoelectric device
photodiode
nicad cell

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Electronic Principles
Which one of the following is a statement of Kirchhoffs current law?

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

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