Electronic Principles Which one of the following kinds of materials has the highest permeability? None of these A ferromagnetic material All of these A paramagnetic material A diamagnetic material None of these A ferromagnetic material All of these A paramagnetic material A diamagnetic material ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The total impedance of a series RLC circuit: always increases as the applied frequency increases always decreases as the applied frequency increases None of these is minimum at the resonant frequency is maximum at the resonant frequency always increases as the applied frequency increases always decreases as the applied frequency increases None of these is minimum at the resonant frequency is maximum at the resonant frequency ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Current and voltage are said to be in phase when: None of these their waveforms cross through zero and reach positive and negative peaks at the same time their waveforms are both ac or both dc they have the same amplitude and frequency All of these None of these their waveforms cross through zero and reach positive and negative peaks at the same time their waveforms are both ac or both dc they have the same amplitude and frequency All of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The core of an electromagnet is said to be in saturation when: changing the polarity of the current in the coil changes the polarity of the magnetic field around the core None of these an increase in current through the coil causes no further increase in the mmf the core is permitted to move freely within the coil frequent changes in the direction of current through the coil causes heating effects in the core material changing the polarity of the current in the coil changes the polarity of the magnetic field around the core None of these an increase in current through the coil causes no further increase in the mmf the core is permitted to move freely within the coil frequent changes in the direction of current through the coil causes heating effects in the core material ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles At cut off, the Q point is at infinity lower end of the load line middle of the load line upper end of the load line None of these infinity lower end of the load line middle of the load line upper end of the load line None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A real voltage source has A small internal resistance Infinite internal resistance None of these A large internal resistance Zero internal resistance A small internal resistance Infinite internal resistance None of these A large internal resistance Zero internal resistance ANSWER DOWNLOAD EXAMIANS APP
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