Electronic Principles The rise time of a pulse waveform is the time required for the voltage to rise: from zero to its rms value from 10% of the peak value to 90% of the peak value None of these from 10% of the peak value to 70.7% of the peak value from zero to its peak value from zero to its rms value from 10% of the peak value to 90% of the peak value None of these from 10% of the peak value to 70.7% of the peak value from zero to its peak value ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A step-down transformer has turns ration of 5:1. If the primary voltage is 120 Vrms, what is the secondary voltage? 18 V 24 V None of these 12 V 30 V 18 V 24 V None of these 12 V 30 V ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The saturation point is approximately the same as upper end of the load line cutoff point infinity None of these lower end of the load line upper end of the load line cutoff point infinity None of these lower end of the load line ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following devices is most often used for measuring opposition to current flow in a circuit? None of these Wattmeter Voltmeter Ohmmeter Ammeter None of these Wattmeter Voltmeter Ohmmeter Ammeter ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Current and voltage are said to be in phase when: All of these they have the same amplitude and frequency their waveforms cross through zero and reach positive and negative peaks at the same time their waveforms are both ac or both dc None of these All of these they have the same amplitude and frequency their waveforms cross through zero and reach positive and negative peaks at the same time their waveforms are both ac or both dc None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A dielectric material is: a good conductor of magnetic fields a good conductor a good insulator None of these a poor conductor of electrostatic fields a good conductor of magnetic fields a good conductor a good insulator None of these a poor conductor of electrostatic fields ANSWER DOWNLOAD EXAMIANS APP
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