問題一覧
1
Current through each component in a parallel circuit is
different
2
Voltage through each component in a series circuit is
different
3
The main purpose of ___________ is to graph an electrical signal as it varies over time.
oscilloscope
4
_________ can be used to measure low DC voltage, wave lengths, audio and phase shifts
oscilloscope
5
BJT bipolar junction transistors
output current is controlled by a small input current, BASE: controls current EMITTER: source COLLECTOR: output current
6
______ leads ______ in an inductive circuit
voltage current
7
Current through each component in a Series Circuit remains
the same
8
what is this?
NPN transistor, IE=IB +IC
9
what are the 3 types of capacitors?
fixed, variable, polarized
10
Voltage through each component in a parallel circuit is
the same
11
______ leads ______ in an capacitive circuit
current voltage
12
Inductors do what?
Store energy in a magnetic field around a conductor, Blocks AC allows DC
13
Schottky Diodes can be rated as low as __ V drop
.2
14
What is a capacitor?
Blocks DC allows AC, Stores energy in an electrical field between a pair on closely spaced conductors (plates)
15
Germanium diodes have a forward voltage drop of __ to __
.25 .30
16
small silicon diodes have anywhere between a __ and __ V drop
.6 .7
17
What is this?
PNP transistor, IC=IE- IB
18
Low pass filters
presents less attenuation to low-frequency signals than high-frequency signals, signals passes through an inductor or capacitor provide path to ground
19
which is true?
Anode + Cathode -
20
Operational amplifiers are frequently used in active filter designs?
true
21
LED’s typically have __ V drop for red and __ V drop for blue
1.7 4.0
22
Frequency is a measure of how often a ____ repeats itself
signal
23
Active filters are implemented using…
passive and active components, require an outside power source
24
Passive filters are?
linear filters based on combinations of resistors, inductors and capacitors
25
what is a diode?
A semiconductor device that allows the flow of current in one direction
26
Active filters upper frequency limit is limited by the ______ of the amplifiers used
bandwidth
27
Passive filters
do not depend on external power supply, do not contain active components
28
A GFCI works by tripping when sensing a current difference more than __ mA between hot and neutral
5mA
29
High pass filters
Signal passes through a capacitor or has a path to ground through an inductor , presents less attenuation to high-frequency signals than low-frequency signals
30
Active filters can have ______, and can achieve ______ without use of _______.
High Q factor , resonance, inductors
31
An OpAmp cannot amplify more than the______
supply voltage
32
what is this
non-inverting amplifier, + input remains + output
33
Lead Acid Antimony battery voltage?
2.15vdc
34
what is this?
inverting amplifier, - input becomes + output
35
Ripple voltage is ?
The portion of a rectified DC voltage that is AC
36
Lead Acid Calcium battery voltage?
2.25vdc
37
Wire diameter decrease by __ gauge increases by __ (base of __)
2, 6, 3
38
NiCad battery voltage?
1.45vdc
39
Doubling the power represents an increase of __ and half the power would be __
3dB, -3dB
40
?
Generic
41
?
Schottky
42
?
Shockley
43
?
Constant Current
44
?
Step recovery
45
?
Photo-
46
?
Light-emitting
47
?
Zener
48
?
Tunnel
49
?
Varactor
50
?
PIN
51
?
vacuum tube