Electronics Final: True/False
0.0047 amps can be expressed in metric units as 47 microA
False
A sine wave's peak value is smaller than its RMS value
False
An ohmmeter can be used to accurately test the impedance of an RL circuit
False
Capacitance is the ability to store voltage
False
Current flows both way simultaneously in an AC circuit
False
Electrolytic capacitors are ideal for alternating current applications
False
Electrons attract each other
False
If a 1/4 W resistor and a 1/2 W resistor are wired in series, they can safely dissipate 3/4 W
False
If a dc voltage is input to a transformer's primary, then an ac voltage is induced in its secondary
False
If one branch of a parallel circuit opens, the total resistance decreases
False
If the voltage applied to a circuit doubles, then power dissipation doubles
False
If three equal resistors are connected in parallel across 12 V, each resistor drops 4V
False
Most diodes are made from a semiconductor material called germanium
False
Reverse breakdown usually occurs when a diode is forward biased by about 0.7 V
False
The general characteristics of a common-emitter amplifier are low voltage fain, low current gain, and very high power gain.`
False
The total inductance of two parallel inductors equals the sum of their inductance values
False
When the input pulse width to an RC integrator is much less than 5t, the output approaches the shape of the input
False
A BJT has three elements: Emitter, gate, and collector
True
A capacitor blocks dc and passes ac
True
A forward-biased silicon diode normally drops about 0.7 V
True
A high pass filter will cause some phase shifting of the signal
True
A magnetic field around a conductor is a good indication that current is flowing
True
A series RLC circuit can be configured for band-pass or band-stop filtering purposes
True
A sine wave's frequency equals the reciprocal of its period
True
A step-down transformer could have a primary-secondary turns ratio of 4:1
True
A zener diode is used as a constant voltage regulator
True
As the frequency applied to an RC circuit increases, the impedance decreases
True
At resonance, Xc equals Kl
True
If a circuit's supply voltage is 15 V and its resistance is 4700 ohms, its current is 3.19 mA
True
If one branch of a parallel circuit shorts, the total resistance decreases
True
Most diodes are made from a semiconductor material called silicon
True
Photodiodes will conduct more as the light intensity upon them increases
True
The ideal amplifier has infinite gain, infinite input impedance, and zero output impedance
True
The terminals on a three-terminal regulator are input voltage, output voltage and ground
True
The two types of BJTs are the NPN and PNP
True
The voltage leads the current in an inductive circuit
True
To measure the current through a resistor, place the ammeter so the current must pass through the meter
True