20) ______ A) reverse breakdown current.
B) C) D) forward-bias current. conventional current. reverse-leakage current. 21) As the forward current through a forward-biased diode decreases, the voltage across the diode 21) ______ increases. is relatively constant. immediately drops to 0 V. increases and then decreases. 22) The resistance of a forward-biased diode is 22) ______ minimal above the knee of the curve. minimal below the knee of the curve. infinite. perfectly linear. 23) The forward voltage across a conducting silicon diode is about 23) ______ -0.3 V. 1.3 V.
0.7 V. 0.3 V. 24) Reverse bias is a condition that essentially ________ current through the diode. 24) ______ A) B) C) D) prevents amplifies allows increases 25) What must be used in series with a forward-biased diode to prevent damage due to excessive current? 25) ______ Resistor NC switch Ammeter Nothing is required. 26) The knee voltage of a diode is approximately equal to the 26) ______ barrier potential. applied voltage.
reverse voltage. breakdown voltage. 27) A silicon diode measures a high value of resistance with the meter leads in both positions. The trouble, if any, is 27) ______ the diode is internally shorted. nothing; the diode is good. the diode is shorted to ground. the diode is open. 28) On diode check, a shorted diode will measure 28) ______ A) B) C) D) 0.3 V. 0.79 V. 0.7 V. 0 V. 29) A nonconducting diode is ________ biased. 29) ______ inverse reverse
forward poorly 30) The application of a dc voltage to control diode conduction is called 30) ______ a pn junction. bias. amplification. oscillation. 31) A reverse-biased silicon diode is connected in series with a 12 V source and a resistor. The voltage across the resistor is 31) ______ 12 V. 0.3 V. 0 V. 0.7 V. 32) A reverse-biased silicon diode is connected in series with a 12 V source and a resistor. The voltage across the diode is 32) ______ A) 12 V.
B) C) D) 0.3 V. 0.7 V. 0 V. 33) A diode is operated in reverse bias. As the reverse voltage is decreased, the depletion region 33) ______ widens. narrows. has a constant width. is not related to reverse voltage. 34) The diode in a half-wave rectifier conducts for ________ of the input cycle. 34) ______ 180° 90° 0° 45° 35) A full-wave bridge rectifier uses ________ diode(s) in a bridge circuit.
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