Electronic Principles Which one of the following phrasers best describes flux density? The concentration of lines of magnetic force None of these The rate of change of the number of lines of magnetic force The opposition to a build-up of magnetic fields The force that maintains lines of force The concentration of lines of magnetic force None of these The rate of change of the number of lines of magnetic force The opposition to a build-up of magnetic fields The force that maintains lines of force ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The core of an electromagnet is said to be in saturation when: the core is permitted to move freely within the coil changing the polarity of the current in the coil changes the polarity of the magnetic field around the core an increase in current through the coil causes no further increase in the mmf None of these frequent changes in the direction of current through the coil causes heating effects in the core material the core is permitted to move freely within the coil changing the polarity of the current in the coil changes the polarity of the magnetic field around the core an increase in current through the coil causes no further increase in the mmf None of these frequent changes in the direction of current through the coil causes heating effects in the core material ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A real voltage source has 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 A small internal resistance ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the barrier potential of a silicon diode at room temperature? 2 m V per degree Celsius 1 V 0.3V 0.7V None of these 2 m V per degree Celsius 1 V 0.3V 0.7V None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The period of a waveform is: None of these equal to 0.707 times the peak amplitude the time required for the voltage to rise from 10% to 90% of the peak amplitude the time required to complete one full cycle the number of cycles completed in one second None of these equal to 0.707 times the peak amplitude the time required for the voltage to rise from 10% to 90% of the peak amplitude the time required to complete one full cycle the number of cycles completed in one second ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Voltage is The number of free electrons in an atom The smallest electrically charged particle None of these Trie force that causes electrons to flow The flow of charged particles through a material The number of free electrons in an atom The smallest electrically charged particle None of these Trie force that causes electrons to flow The flow of charged particles through a material ANSWER DOWNLOAD EXAMIANS APP
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