Electronic Principles Which one of the following principles best describes the basic operation of an electromagnet? None of these Current flowing through a conductor generates a magnetic field Like magnetic poles repel, while unlike poles attract Like magnetic poles attract, while unlike poles repel Current is induced in a conductor that is moving through a magnetic field None of these Current flowing through a conductor generates a magnetic field Like magnetic poles repel, while unlike poles attract Like magnetic poles attract, while unlike poles repel Current is induced in a conductor that is moving through a magnetic field ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The transistor has a collector current of 2 mA. If the current gain is 135, what is the base current? 10.3 µA None of these 14.8 µA 7.8 µA 7.75 µA 10.3 µA None of these 14.8 µA 7.8 µA 7.75 µA 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 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 they have the same amplitude and frequency None of these their waveforms are both ac or both dc ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Silicon atoms combine into an orderly pattern called a Covalent bond Crystal None of these Valence orbit Semiconductor Covalent bond Crystal None of these Valence orbit Semiconductor ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The rotating coil of wire in an electric motor is called the: commutator loop armature brush None of these commutator loop armature brush None of these ANSWER DOWNLOAD EXAMIANS APP
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