Electronic Principles A device that converts thermal energy to electrical energy is called a: solar cell chemical cell piezoelectric devices thermocouple None of these solar cell chemical cell piezoelectric devices thermocouple None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following phrasers best describes flux density? The concentration of lines of magnetic force The opposition to a build-up of magnetic fields The rate of change of the number of lines of magnetic force None of these The force that maintains lines of force The concentration of lines of magnetic force The opposition to a build-up of magnetic fields The rate of change of the number of lines of magnetic force None of these The force that maintains lines of force ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A transformer has a primary voltage of 120 V rms and a secondary voltage of 25 V rms. If the secondary current is 1A rms, what is the primary current? 200 mA 300 mA 208 mA 7.8 mA None of these 200 mA 300 mA 208 mA 7.8 mA None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following statements is true for the voltage in a parallel RC circuit? The total voltage leads the total current by less than 90 degree The total voltage is equal to the sum of the voltages across the resistance and capacitance The total voltage is less than the sum of the voltages across the resistance and capacitance None of these The voltage always has the same amplitude and phase for every part of the circuit The total voltage leads the total current by less than 90 degree The total voltage is equal to the sum of the voltages across the resistance and capacitance The total voltage is less than the sum of the voltages across the resistance and capacitance None of these The voltage always has the same amplitude and phase for every part of the circuit ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Suppose a step-down transformer has a turns ration of 5:1. If the secondary current is 1A rms, what is the primary-current? 0.3 A 0.2 A 0.6 A None of these 0.4 A 0.3 A 0.2 A 0.6 A None of these 0.4 A ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the inductive reactance of a 2-H coil operating at 60 Hz? None of these 754 Ohm 60 Ohm 120 Ohm 30 Ohm None of these 754 Ohm 60 Ohm 120 Ohm 30 Ohm ANSWER DOWNLOAD EXAMIANS APP
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