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? 208 mA 200 mA 300 mA None of these 7.8 mA 208 mA 200 mA 300 mA None of these 7.8 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles If the current gain is 200 and the collector current is 100 mA, the base current is 0.5 mA None of these 200 A 2 mA 0.083333333333333 0.5 mA None of these 200 A 2 mA 0.083333333333333 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The period of a waveform is: equal to 0.707 times the peak amplitude the number of cycles completed in one second None of these the time required to complete one full cycle the time required for the voltage to rise from 10% to 90% of the peak amplitude equal to 0.707 times the peak amplitude the number of cycles completed in one second None of these the time required to complete one full cycle the time required for the voltage to rise from 10% to 90% of the peak amplitude ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is a free electron? None of these An electron that has twice the amount of charge of a normal electron An electron that costs nothing An electron that has been freed from its parent atom An electron that has no electrical charge None of these An electron that has twice the amount of charge of a normal electron An electron that costs nothing An electron that has been freed from its parent atom An electron that has no electrical charge ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following statements applies to common auto batteries? None of these Auto batteries are primary dry-cell batteries Auto batteries are secondary wet-cell batteries Auto batteries are primary wet-cell batteries Auto batteries are secondary dry-cell batteries None of these Auto batteries are primary dry-cell batteries Auto batteries are secondary wet-cell batteries Auto batteries are primary wet-cell batteries Auto batteries are secondary dry-cell batteries ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles One henry of inductance is defined as: the amount of inductance required for generating 1 V of counter emf when the current changes at the rate of 1 A per second None of these the number of turns of wire in an inductor multiplied by the amount of current flowing through it the amount of counter emf required to reduce a current to 1 A the amount of inductance required to change the frequency of a current by 1 Hz the amount of inductance required for generating 1 V of counter emf when the current changes at the rate of 1 A per second None of these the number of turns of wire in an inductor multiplied by the amount of current flowing through it the amount of counter emf required to reduce a current to 1 A the amount of inductance required to change the frequency of a current by 1 Hz ANSWER DOWNLOAD EXAMIANS APP
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