When the graph of current versus voltage is a straight line, the device is referred to as
Active
Linear
Nonlinear
Passive
What kind of device is a resistor?
Unilateral
Bipolar
What kind of device is a diode?
Bilateral
Unipolar
How is a nonconducting diode biased?
Forward
Inverse
Poorly
Reverse
When the diode current is large, the bias is
Poor
The knee voltage of a diode is approximately equal to the
Applied voltage
Barrier potential
Breakdown voltage
Forward voltage
The reverse current consists of minority-carrier current and
Avalanche current
Forward current
Surface-leakage current
Zener current
How much voltage is there across the second approximation of a silicon diode when it is forward biased?
0
0.3 V
0.7 V
1 V
How much current is there through the second approximation of a silicon diode when it is reverse biased?
1 mA
300 mA
None of the above
How much forward diode voltage is there with the ideal diode approximation?
More than 0.7 V
The bulk resistance of a 1N4001 is
0.23 Ω
10 Ω
1 kΩ
If the bulk resistance is zero, the graph above the knee becomes
Horizontal
Vertical
Tilted at 45°
The ideal diode is usually adequate when
Troubleshooting
Doing precise calculations
The source voltage is low
The load resistance is low
The second approximation works well when
Load resistance is high
Source voltage is high
All of the above
The only time you have to use the third approximation is when
Load resistance is low
How much load current is there in Fig. 3-21 with the ideal diode?
11.3 mA
12 mA
25 mA
How much load current is there in fig 3-21 with the second approximation?
How much load current is there in fig 3-21 with the third approximation?
If the diode is open in fig 3-21 the load voltage is
11.3 V
20 V
-15 V
If the resistor is ungrounded in fig 3-21, the voltage measured with a DMM between the top of the resistor and ground is closest to
12 V
The load voltage measures 12 V in fig 3-21 The trouble may be
A shorted diode
An open diode
An open load resistor
Too much supply voltage
Using the third approximation in fig 3-21 how low must Rl be before the diode's bulk resistance must be considered?
1 Ω
23 Ω
100 Ω
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