Electronic Principles Which one of the following devices is most often used for measuring opposition to current flow in a circuit? Wattmeter Ammeter Ohmmeter Voltmeter None of these Wattmeter Ammeter Ohmmeter Voltmeter None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A transistor has a current gain of 125 and a base current of 30 µA. What is the collector current? 3.2 mA 0.05 mA 3.75 mA None of these 13 mA 3.2 mA 0.05 mA 3.75 mA None of these 13 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A certain power transformer has a turns ratio of 5. What voltage can you expect at the secondary winding when you apply 120 V to the primary winding? 600 V 0.4 V 4.73 None of these 24 V 600 V 0.4 V 4.73 None of these 24 V ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the smallest number of polarities required for current flow? Two - a negative terminal and a positive terminal Four - two negative and two positive None of these One - a negative terminal Three - negative, positive and neutral terminals Two - a negative terminal and a positive terminal Four - two negative and two positive None of these One - a negative terminal Three - negative, positive and neutral terminals ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A diode is in series with 220W. If the voltage across the resister is 4V, what is the current through the diode? None of these 18.2 mA 55.86 A 55 A 16.3 mA None of these 18.2 mA 55.86 A 55 A 16.3 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following principles best describes the basic operation of an electromagnet? Like magnetic poles repel, while unlike poles attract None of these Current flowing through a conductor generates a magnetic field Current is induced in a conductor that is moving through a magnetic field Like magnetic poles attract, while unlike poles repel Like magnetic poles repel, while unlike poles attract None of these Current flowing through a conductor generates a magnetic field Current is induced in a conductor that is moving through a magnetic field Like magnetic poles attract, while unlike poles repel ANSWER DOWNLOAD EXAMIANS APP
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