SIMPLE PHYSICS QUESTIONS

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ecet_220_week_2_quiz-final.docx
Home>Engineering homework help>Electrical Engineering homework help>SIMPLE PHYSICS QUESTIONS

1. (TCO 1) The voltage drop across a reverse-biased silicon diode is approximately (Points : 5)

       0 V.        0.3 V.        0.7 V.        dependent on the supply voltage.

Question 2. 2. (TCO 1) The output frequency of a full-wave rectifier with a 60 Hz sinusoidal waveform input signal is (Points : 5)

       120 Hz.        60 Hz.        30 Hz.        DC or 0 Hz.

Question 3. 3. (TCO 1) An ideal center-tapped transformer used in a full-wave rectifier circuit will NOT serve this function by (Points : 5)

       providing electrical isolation.        step-down the AC voltage.        filtering the rectified signal.        efficiently transfer the primary power to the secondary power.

Question 4. 4. (TCO 1) What condition will cause a zener diode to fail? (Points : 5)

       Operating the zener diode below the zener knee voltage.        Applying a positive voltage to the anode of the zener diode.        Exceeding the zener diode power rating.        Operating the zener diode at the zener test current.

Question 5. 5. (TCO 1) If the zener diode in the circuit is open, the output voltage will (Points : 10)

       decrease.        increase.        not change.        go to 0 VDC.

Question 6. 6. (TCO 2) Beta (β) is the ratio of (Points : 5)

       collector current to base current.        collector current to emitter current.        emitter current to base current.        output voltage to input voltage.

Question 7. 7. (TCO 2) A bipolar junction transistor operating in the saturated region can be recognized by (Points : 5)

       a base-emitter voltage drop of 0.7 V.        a base current of 0 mA.        VCC between the collector and emitter.        a very small voltage between the collector and emitter.

Question 8. 8. (TCO 2) If R2 in the circuit shown is open, (Points : 10)

       the base voltage will decrease.        the base voltage will increase.        the base voltage will not change.        the base-emitter voltage increases significantly.

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