semifinal Flashcards
if the frequency of a series RL circuit is increased, the total current will ___
decrease
the total opposition to current flow in an RL circuit is expressed in a quantity called _____
impedance
if the frequency of a parallel rc circuit is increased, the total currents will _____
increase
Which is the most widely used semiconductor material
silicon
when voltage is applied to a diode the action occurring in the ____ region either block current flow or passes current
depletion
A shorted diode is indicated by low resistance in _____
both direction
The primary purpose of a zener diode is to last as a _____ either by itself or in conjunction with other semiconductor devices
voltage regulator
A diode will conduct normal current when the _____ is positive with respect to the _____
anode
cathode
discs are used almost exclusively as _____ devices
triggering
to test as SCR with an ohmmeter connect the _______ led to the anode and the ______ lead to the cathode
positive
negative
The fastest way to turn off an SCR is by
zero biasing it
The greatest advantage of a photoemissive device is its
speed of operation
oscillators
in-phase feedback is called positive feedback
an oscillator is a device that converts dc to ac
an oscillator is an amplifier that supplies its own input signal
You are testing an SCR with an OHMMETER. You have connected the positive output lead of the meter to the cathode and the negative lead to the anode. The ohmmeter indicates continuity through the SCR. You should conclude the SCR us _____
shorted
The primary function of an octogenarian-coupler is to provide electrical ____ between inputs and outputs, especially in the presence of high voltages
isolation
A proprietary supervising station is under ______ and must be located on _____
single ownership
property owned by the owner of the station