Test Your EQ
— Issue #161
Each month, Test Your EQ presents
some basic engineering problems for you to test
your Engineering Quotient. What's your EQ?
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Problem
1—What
is the purpose of the 10-kW
feedback resistor in the following op-amp circuit?
Answer
Problem
2—What is the difference between foreground code
and background code?
Answer
Problem 3—What
is the self-resonant frequency of an inductor?
Answer
Problem
4—Which three pure elemental metals exhibit ferromagnetism?
Answer
Problem
5—What is the basic architecture of a power factor
controller for an electronic power supply?
Answer
Problem
6—What is the shape of ripple voltage at the
output of this type of circuit as compared to an ordinary
bridge rectifier and capacitor-type supply?
Answer
Problem
7—What is the relative magnitude of the ripple
voltage? What does this imply about the filter capacitor?
