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