Electronic Principles MCQ Questions & Answers

81

What is the barrier potential of a silicon diode at room temperature?

A) 0.7V B) 0.3V C) 1 V D) 2 m V per degree Celsius E) None of the above

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Answer & Solution

Answer: Option A

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82

The Norton current is sometimes called the

A) Shorted-load current B) Open-load current C) Thevenin current D) Thevenin voltage E) None of the above

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Answer & Solution

Answer: Option A

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83

At room temperature a conductor has low many holes?

A) Same number as free electrons B) many C) Only those produced by thermal energy D) less than the free electrons E) None of the above

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Answer & Solution

Answer: Option A

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84

A current source has an internal resistance of 100 kW. What is the largest load resistance if the current source must appear stiff?

A) 2 k Ohm B) 10 k Ohm C) 20 k Ohm D) 1 k Ohm E) None of the above

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Answer: Option D

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85

When the Q point moves along the load line, the voltage increases when the current

A) Decreases B) Stays the same C) Increases D) Can be any of above E) None of the above

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Answer: Option C

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86

What is the smallest number of polarities required for current flow?

A) One - a negative terminal B) Two - a negative terminal and a positive terminal C) Three - negative, positive and neutral terminals D) Four - two negative and two positive E) None of the above

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Answer & Solution

Answer: Option B

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87

A diode is in series with 220W. If the voltage across the resister is 4V, what is the current through the diode?

A) 55 A B) 55.86 A C) 18.2 mA D) 16.3 mA E) None of the above

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Answer: Option C

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88

Two diodes are in series. The first diode has a voltage of 0.75 V and the second has a voltage of 0.8 V. If the current through the first diode is 500 mA, what is the current through the second diode

A) 11 mA B) 12 mA C) 10 mA D) 14 mA E) None of the above

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Answer & Solution

Answer: Option C

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89

The graph of current gain versus collector current indicates that the current gain

A) varies enormously B) is contant C) varies slightly D) equals the collector current divided by the base current E) None of the above

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Answer: Option D

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90

Which one of the following statements is true for the currents in a parallel RL circuit?

A) The total current is equal to the sum of the currents through the resistance and inductance B) The current always has the same amplitude and phase for every part of the circuit C) The total current is less than the sum of the currents through the resistance and inductance D) The total current leads the total voltage by less than 90 E) None of the above

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Answer: Option C

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Electronic Principles MCQ Questions & Answers | Computer Science