Electronic Principles MCQ Questions & Answers

61

The direction of electron current flow is:

A) from right to left B) from positive to negative C) from negative to positive D) from neutral to positive E) None of the above

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Answer & Solution

Answer: Option C

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62

A device that converts mechanical pressure to electrical energy is called a:

A) piezoelectric device B) solar cell C) photodiode D) nicad cell E) None of the above

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Answer & Solution

Answer: Option A

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63

Which one of the following statements is true for the voltage in a parallel RC circuit?

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

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Answer & Solution

Answer: Option A

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64

The Thevenin resistance is equal in value to the

A) Load resistance B) Half the load resistance C) Internal resistance of a Morton circuit D) Open-load resistance E) None of the above

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Answer & Solution

Answer: Option A

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65

Most AC power is obtained from:

A) generators B) batteries C) oscillators D) lightning E) None of the above

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Answer & Solution

Answer: Option C

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66

The value of a capacitor can be made larger by:

A) increasing the area of the plates B) decreasing the area of the plates C) increasing the frequency of the applied voltage D) increasing the voltage applied to the plates E) None of the above

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Answer & Solution

Answer: Option A

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67

The value of a capacitor can be made larger by:

A) moving the plates further apart B) moving the plates closer together C) increasing the voltage applied to the plates D) decreasing the voltage applied to the plates E) None of the above

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Answer: Option B

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68

The primary impedance of a transformer is 60 ohm and the secondary impedance is 120 ohm. What is the impedance ratio?

A) 0.25 B) 180 C) 0.5 D) 4 E) None of the above

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Answer & Solution

Answer: Option C

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69

Suppose a voltage source has an ideal voltage of 12V and an internal resistance of 0.5W. For what values of load resistance will the voltage source appear stiff?

A) 5 Ohm B) 50 Ohm or more C) 100 Ohm D) 6 Ohm E) None of the above

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Answer: Option B

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70

Electron current is flowing through a conductor in a direction you might describe as straight into this page. What is the direction of the resulting magnetic field?

A) Clockwise B) Counterclockwise C) Out of this page D) Into this page E) None of the above

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Answer & Solution

Answer: Option B

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Electronic Principles MCQ Questions & Answers | Computer Science