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? None of these 208 V 651 V 700 V 707 V None of these 208 V 651 V 700 V 707 V ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following principles best describes the basic operation of an electromagnet? Current is induced in a conductor that is moving through a magnetic field Current flowing through a conductor generates a magnetic field Like magnetic poles attract, while unlike poles repel Like magnetic poles repel, while unlike poles attract None of these Current is induced in a conductor that is moving through a magnetic field Current flowing through a conductor generates a magnetic field Like magnetic poles attract, while unlike poles repel Like magnetic poles repel, while unlike poles attract None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A device that converts thermal energy to electrical energy is called a: solar cell piezoelectric devices None of these thermocouple chemical cell solar cell piezoelectric devices None of these thermocouple chemical cell ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The transistor has a collector current of 10 mA and a base current of 40 mA. What is the current gain of the transistor? None of these 350 µA 0.25 µA 300 µA 250 µA None of these 350 µA 0.25 µA 300 µA 250 µA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following statements is true for the voltage in a parallel RL circuit? The voltage always has the same amplitude and phase for every part of the circuit The total voltage is equal to the sum of the voltages across the resistance and inductance The total voltages is less than the sum of the voltages across the resistance and inductance None of these The total voltage lags the total current by less than 90 The voltage always has the same amplitude and phase for every part of the circuit The total voltage is equal to the sum of the voltages across the resistance and inductance The total voltages is less than the sum of the voltages across the resistance and inductance None of these The total voltage lags the total current by less than 90 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A farad is defined as the amount of capacitance necessary for: None of these causing an ac phase shift greater than 90 degree storing 1 V for 1 second dissipating 1 W of power changing the voltage on the plates at the rate of 1 V per second when 1 A of current is flowing None of these causing an ac phase shift greater than 90 degree storing 1 V for 1 second dissipating 1 W of power changing the voltage on the plates at the rate of 1 V per second when 1 A of current is flowing ANSWER DOWNLOAD EXAMIANS APP
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