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

piezoelectric device
solar cell
nicad cell
photodiode
None of these

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

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

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