Electronic Principles
Which one of the following is a direct statement of Ohm's law?

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

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

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

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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 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
Hysteresis is the amount of magnetic flux that is not confined to the core material of an electromagnet

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