Electronic Principles Which one of the following statements regarding ac circuits is correct? All of these None of these Current leads the voltage through a resistor Current lags the voltage through a resistor Current and voltages are in phase through a resistor All of these None of these Current leads the voltage through a resistor Current lags the voltage through a resistor Current and voltages are in phase through a resistor ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is one important thing transistors do? Emit light Rectify line voltage Regulate voltage Amplify weak signals None of these Emit light Rectify line voltage Regulate voltage Amplify weak signals None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The equivalent of 1 micro A is: 10000A None of these one million amperes 1000 A one-millionth of an ampere 10000A None of these one million amperes 1000 A one-millionth of an ampere ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A transistor has a current gain of 125 and a base current of 30 µA. What is the collector current? 0.05 mA 3.75 mA None of these 3.2 mA 13 mA 0.05 mA 3.75 mA None of these 3.2 mA 13 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following phrases best describes residual magnetism? 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 The amount of magnetic flux that is not confined to the core material of an electromagnet Magnetism that remains in the core of an electromagnet after the current through the coil is turned off None of these 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 The amount of magnetic flux that is not confined to the core material of an electromagnet Magnetism that remains in the core of an electromagnet after the current through the coil is turned off None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles In a pure inductor: ac current and voltage are exactly in phase ac current leads the voltage by 90 degree ac current is converted to dc voltage None of these ac current lags the voltage by 90 degree ac current and voltage are exactly in phase ac current leads the voltage by 90 degree ac current is converted to dc voltage None of these ac current lags the voltage by 90 degree ANSWER DOWNLOAD EXAMIANS APP
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