Electronic Principles Suppose the peak value of a sinusoidal voltage is 50 V. What is the rms value? 37.4 V 38.74 V 35.4 V None of these 30.4 V 37.4 V 38.74 V 35.4 V None of these 30.4 V ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles 1 Microfarad is the same as: 1 million farads None of these 1 millionth of a picofarad 1000 millifarads 1 million picofarads 1 million farads None of these 1 millionth of a picofarad 1000 millifarads 1 million picofarads ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A step-up transformer has a turns ratio of 1:4. If the line voltage is 115 V rms, what is the peak secondary voltage? 651 V 700 V None of these 208 V 707 V 651 V 700 V None of these 208 V 707 V ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Doubling the diameter of the coil in an inductor: reduces the value of inductance by one-fourth reduces the value of inductance by one-half multiplies the value of inductance by four multiplies the value of inductance by two None of these reduces the value of inductance by one-fourth reduces the value of inductance by one-half multiplies the value of inductance by four multiplies the value of inductance by two None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of. the following phrases most accurately describes the nature of a pulsating dc voltage? The voltage remains at one polarity but changes value periodically The voltage remains at one polarity and at a steady level The voltage causes current to flow in two directions at the same time None of these The voltage reverses polarity periodically The voltage remains at one polarity but changes value periodically The voltage remains at one polarity and at a steady level The voltage causes current to flow in two directions at the same time None of these The voltage reverses polarity periodically ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Current and voltage are said to be in phase when: their waveforms cross through zero and reach positive and negative peaks at the same time None of these they have the same amplitude and frequency All of these their waveforms are both ac or both dc their waveforms cross through zero and reach positive and negative peaks at the same time None of these they have the same amplitude and frequency All of these their waveforms are both ac or both dc ANSWER DOWNLOAD EXAMIANS APP
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