Electric Circuits
For closer tolerance which of the following capacitors is usually preferred?

 Ceramic disc capacitor.
 Paper capacitor.
 Mica capacitor.
 None of them.

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Electric Circuits
A pole of driving point impedance is

 zero voltage for a finite value of driving voltage.
 zero voltage for a finite value of driving current.
 zero current for a finite value of driving voltage.
 zero current for a finite value of driving current.

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