Electronic Principles Which one of the following devices is most often used for measuring electrical potential difference? None of these Voltmeter Wattmeter Ohmmeter Ammeter None of these Voltmeter Wattmeter Ohmmeter Ammeter ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following equations most directly determines the power dissipation of a resistance when you know the power dissipation of a resistance when you know the voltage drop and current? None of these P = E2/R P = I2R P = IE I = P/E None of these P = E2/R P = I2R P = IE I = P/E ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following phrases best describes residual magnetism? The force of attraction between the poles of a permanent and temporary magnetic field None of these Magnetism that remains in the core of an electromagnet after the current through the coil is turned off The amount of magnetic flux that is not confined to the core material of an electromagnet The circular magnetic field that surrounds a conductor carrying a current The force of attraction between the poles of a permanent and temporary magnetic field None of these Magnetism that remains in the core of an electromagnet after the current through the coil is turned off The amount of magnetic flux that is not confined to the core material of an electromagnet The circular magnetic field that surrounds a conductor carrying a current ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The rise time of a pulse waveform is the time required for the voltage to rise: from zero to its rms value from 10% of the peak value to 70.7% of the peak value None of these from 10% of the peak value to 90% of the peak value from zero to its peak value from zero to its rms value from 10% of the peak value to 70.7% of the peak value None of these from 10% of the peak value to 90% of the peak value from zero to its peak value 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? 208 mA 300 mA 7.8 mA None of these 200 mA 208 mA 300 mA 7.8 mA None of these 200 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The current gain of a transistor is defined as the ratio of the collector current to the collector current base current emitter current None of these supply current collector current base current emitter current None of these supply current ANSWER DOWNLOAD EXAMIANS APP
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