Electronic Principles A step-up transformer has a turns ratio of 1:4. If the line voltage is 115 V rms, what is the peak secondary voltage? 707 V 700 V None of these 208 V 651 V 707 V 700 V None of these 208 V 651 V 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
Electronic Principles Which one of the following statements most accurately reflects the nature of ac power? None of these The current in an ac circuit flows in two directions at the same time The current in an ac circuit flows in one direction at a steady level The current in an ac circuit flows in one direction, but changes value periodically The current in an ac circuit changes direction periodically None of these The current in an ac circuit flows in two directions at the same time The current in an ac circuit flows in one direction at a steady level The current in an ac circuit flows in one direction, but changes value periodically The current in an ac circuit changes direction periodically ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the smallest number of polarities required for current flow? Four - two negative and two positive None of these Three - negative, positive and neutral terminals Two - a negative terminal and a positive terminal One - a negative terminal Four - two negative and two positive None of these Three - negative, positive and neutral terminals Two - a negative terminal and a positive terminal One - a negative terminal ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the difference between a conductor and an insulator? An insulator allows current to flow much easier than a conductor does None of these A conductor allows current to flow much easier than an insulator does The difference between conductors and insulators depends on how they are used An insulator has an excessive number of free electrons, while a conductor has a few free electrons or none at all An insulator allows current to flow much easier than a conductor does None of these A conductor allows current to flow much easier than an insulator does The difference between conductors and insulators depends on how they are used An insulator has an excessive number of free electrons, while a conductor has a few free electrons or none at all ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the phase shift between total current and voltage, if 100 ohm resistor connected in parallel with an inductor that has a reactance of 200W? 26.6 degree None of these 180 degree 0 degree 90 degree 26.6 degree None of these 180 degree 0 degree 90 degree ANSWER DOWNLOAD EXAMIANS APP
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