Chapters 13-14 - Capacitors & Inductors True or False Questions

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Capacitance is measured in henries.

False

Energy is stored by a capacitor in a magnetic field concentrated in the dielectric.

False

The millihenry is the unit of inductance.

False

Capacitors block DC current flow.

True

The voltage of an inductor at DC is essentially zero if RW is assumed small.

True

Voltage is induced in an inductor when the current through it changes in time.

True

XL grows larger as the frequency is increased in a circuit.

True

XL is the DC opposition to current flow.

False

All coils will have internal resistance RW present, which is the winding resistance.

True

RW is often ignored in calculations since it can be small.

True

Total capacitance in a series connection increases as capacitors are added in series.

False

XC grows larger as the frequency is increased in a circuit.

False

XC is the DC opposition to current flow.

False

A coil is another name for an inductor.

True

An inductor opposes an instantaneous change in its own current.

True

Capacitance is the measure of a capacitor's ability to store electrical charge.

True

Changing electromagnetic field in an inductor creates induced voltage across inductor.

True

Current in a coil of wires forms a magnetic field when AC current is fed through the wire.

True

Electrolytic capacitors are polarized and must be connected with proper orientation.

True

Energy is stored in an inductor in its electrostatic field.

True

Hooking up an electrolytic backwards can cause the part to fail or explode.

True

In DC world, the inductor acts like a short to DC circuits after 5 time constants.

True

In a DC world, capacitors act like an open circuit to DC circuits after 5 time constants.

True

Inductance is measured in henries.

True

Inductors are short circuits (like a wire) to DC circuits.

True

Inductors pass DC current flow.

True

XL is proportional to inductance and frequency.

True


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