Electronic Principles MCQ Questions & Answers

51

Which one of the following statements most accurately applies to the frequency of a waveform?

A) The actual frequency of a sine waveform is 1.41 times the working frequency B) Unless specified otherwise, the frequency of a waveform is assumed to be 60 Hz C) The higher the amplitude of a waveform, the higher its frequency D) The longer the period of a waveform, the lower its frequency E) None of the above

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Answer & Solution

Answer: Option A

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52

The merging of a free electron and a hole is called

A) Covalent bonding B) Lifetime C) Recombination D) Thermal energy E) None of the above

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Answer & Solution

Answer: Option C

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53

One henry of inductance is defined as:

A) the amount of counter emf required to reduce a current to 1 A B) the amount of inductance required for generating 1 V of counter emf when the current changes at the rate of 1 A per second C) the amount of inductance required to change the frequency of a current by 1 Hz D) the number of turns of wire in an inductor multiplied by the amount of current flowing through it E) None of the above

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Answer & Solution

Answer: Option B

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54

The basic unit of measurement for current is the:

A) volt B) watt C) ampere D) ohm E) None of the above

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Answer & Solution

Answer: Option C

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55

Which one of. the following phrases most accurately describes the nature of a pulsating dc voltage?

A) The voltage remains at one polarity and at a steady level B) The voltage remains at one polarity but changes value periodically C) The voltage causes current to flow in two directions at the same time D) The voltage reverses polarity periodically E) None of the above

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Answer & Solution

Answer: Option B

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56

What is a negative ion?

A) An atom that contains more electrons than neutrons B) An atom that contains more protons than neutrons C) An atom that contains more electrons than protons D) An atom that contains more protons than electrons E) None of the above

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Answer & Solution

Answer: Option C

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57

In a transistor operates at the middle of the load line, an increase in the base resistance will move the Q point

A) down B) up C) nowhere D) off the load line E) None of the above

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Answer & Solution

Answer: Option A

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58

Voltage is

A) The flow of charged particles through a material B) The smallest electrically charged particle C) Trie force that causes electrons to flow D) The number of free electrons in an atom E) None of the above

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Answer & Solution

Answer: Option C

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59

What is the turns ratio for the transformer specified in the above question?

A) 10.738 B) 0.707 C) 1.5 D) 0.575 E) None of the above

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Answer & Solution

Answer: Option B

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60

The total impedance of a series RLC circuit:

A) is minimum at the resonant frequency B) always increases as the applied frequency increases C) always decreases as the applied frequency increases D) is maximum at the resonant frequency E) None of the above

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Answer & Solution

Answer: Option A

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Electronic Principles MCQ Questions & Answers | Computer Science