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 None of these 208 mA 7.8 mA 200 mA 300 mA None of these 208 mA 7.8 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles At room temperature a conductor has low many holes? many Same number as free electrons Only those produced by thermal energy None of these less than the free electrons many Same number as free electrons Only those produced by thermal energy None of these less than the free electrons ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The secondary voltage for a certain power transformer is twice the voltage applied to the primary. The current flowing in the secondary winding will be: Twice the primary current None of these Same as the primary current No more than 10% less than the primary current One-half the primary current Twice the primary current None of these Same as the primary current No more than 10% less than the primary current One-half the primary current ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The current gain of a transistor is defined as the ratio of the collector current to the emitter current base current None of these supply current collector current emitter current base current None of these supply current collector current ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The emitter diode is usually Operating in the breakdwon region Nonconducting None of these Reverse-biased Forward-biased Operating in the breakdwon region Nonconducting None of these Reverse-biased Forward-biased ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A loadstone is: a natural magnet an artificial magnet None of these a paramagnetic alloy a temporary magnet a natural magnet an artificial magnet None of these a paramagnetic alloy a temporary magnet ANSWER DOWNLOAD EXAMIANS APP
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