Electronic Principles Current and voltage are said to be in phase when: they have the same amplitude and frequency None 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 All of these they have the same amplitude and frequency None 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 All of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Suppose a step-down transformer has a turns ration of 5:1. If the secondary current is 1A rms, what is the primary-current? 0.3 A 0.2 A None of these 0.4 A 0.6 A 0.3 A 0.2 A None of these 0.4 A 0.6 A ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What kind of battery is most likely included in a cordless electric knife? Nicad battery Mercury-cell battery Lead-acid battery None of these Zinc-carbon battery Nicad battery Mercury-cell battery Lead-acid battery None of these Zinc-carbon battery ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the capacitive reactance of a 0.1 micro F capacitor that is operating at 1000 Hz? 1590 Ohm less than 1 Ohm None of these 312 Ohm 690 Ohm 1590 Ohm less than 1 Ohm None of these 312 Ohm 690 Ohm ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A device that converts thermal energy to electrical energy is called a: chemical cell None of these solar cell piezoelectric devices thermocouple chemical cell None of these solar cell piezoelectric devices thermocouple ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The graph of current gain versus collector current indicates that the current gain None of these varies slightly is contant equals the collector current divided by the base current varies enormously None of these varies slightly is contant equals the collector current divided by the base current varies enormously ANSWER DOWNLOAD EXAMIANS APP
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