1.The forward voltage drop across a diode demonstrates (a) _____________ tempera
ID: 1716858 • Letter: 1
Question
1.The forward voltage drop across a diode demonstrates (a) _____________ temperature coefficient (tempco)
a. zero b. positive c. either positive or negative d. negative
2.A silicon diode has a forward voltage drop of 0.65 V at 25oC. Determine its voltage drop at 55 degrees Celsius.
a.0.59V b. 0.49V c. 0.75 d. 0.7
3.The reverse saturation current through a diode demonstrates (a) _____________ temperature coefficient (tempco).
a. zero b. either positive or negetive c. negetive d. positive
4.A true zener diode has a breakdown voltage _____________ (above, below) 5 volts, and a ____________ (positive, negative) temperature coefficient.
a. Below, negative b. below positive c. above, positive d. above, negetive
5.As the temperature of a thermistor is raised, its resistance will _______________ (increase, decrease) in a _______________ (linear, non-linear) fashion.
A.decrease, nonlinear B.Increase, linear C.Increase, nonlinear D. Decrease, linear
6.A varistor acts like two back-to-back ____________ in series
A. rectifier B.Thermistor C. PTC resistors D. Zener diodes
7.A photoconductive cell has a terminal resistance that _______________ as the light intensity increases.
A. Increase B. Decrease
8.A photodiode’s reverse current ______________ (increases, decreases) as the light as the light intensity increases.
A. Increase B. Decrease
9.In essence a solar cell is simply a ________________ that is being operated in its photovoltaic mode of operation.
A. Photoconductive cell B. Laser diode C. Photodiode D. Light-emitting diode
10.The reverse recovery time (trr) of a diode is a measure of how long it takes to ___________.
A. Turn on B. turn off
11. When a heavily-doped n-type (n+) semiconductor is placed next to metal a(n) ___________ is formed.
A.Ohmic connection
B. Schottky barrier
12. When a lightly-doped n-type (n-) semiconductor is placed next to metal a(n) ___________ is formed.
a. Schottky barrier b. Ohmic connection
A.Ohmic connection
B. Schottky barrier
Explanation / Answer
1)NEGETIVE
2) THE FORWARD VOLTAGE WILL CHANGE -2.5mv per degree rise in temperature....the forward voltage at 55 0c is 0.59v
3)NEGETIVE
4)ABOVE 5 VOLTS
5) INCREASE FOR POSITIVE TEMPETARURE COEFFICIENT AND DECREASE FOR NEGATIVE TEMPERATURE COEFFICIENT, AND IT IS A HIGHLY NON LINEAR
6) ZENER DIODE
7) DECREASE
8) INCREASES
9)PHOTO DIODE
10)TURN OFF
11) OHMIC CONNECTION
12) SCHOTTKY BARRIER
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.