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

electric device
solar cell
None of these
chemical cell
thermocouple

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Electronic Principles
When applying a square waveform to a capacitor, the circuit tends to:

round off both the voltage and current waveforms
None of these
peak the voltage and round off the current waveforms
peak both the voltage and current waveforms
peak the current and round off the voltage waveforms

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Electronic Principles
Which one of the following phrasers best describes flux density?

None of these
The force that maintains lines of force
The rate of change of the number of lines of magnetic force
The concentration of lines of magnetic force
The opposition to a build-up of magnetic fields

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

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

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