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 principles best describes the basic operation of an electromagnet?

Like magnetic poles repel, while unlike poles attract
Current flowing through a conductor generates a magnetic field
None of these
Like magnetic poles attract, while unlike poles repel
Current is induced in a conductor that is moving through a magnetic field

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Electronic Principles
When a parallel RLC circuit is operating at its resonant frequency:

inductive reactance is greater than the capacitive reactance
the difference between inductive and capacitive reactance is equal to the resistance
capacitive reactance is greater than the inductive reactance
None of these
inductive reactance is equal to the capacitive reactance

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Electronic Principles
In a pure inductor:

ac current leads the voltage by 90 degree
None of these
ac current and voltage are exactly in phase
ac current lags the voltage by 90 degree
ac current is converted to dc voltage

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Electronic Principles
Molecule is

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
The smallest particle of a substance that retains the properties of that substance
None of these
A atom that has a shortage of electrons in its outer orbit

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