Electronic Principles An unloaded zener regulator has a source voltage of 20 V, a series resistance of 330 W, and a zener voltage of 12 V, What is the Zener current? 28.4 mA 24.2 mA 68.4 mA 34.4 mA None of these 28.4 mA 24.2 mA 68.4 mA 34.4 mA None of these 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 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 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 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 None of these The circular magnetic field that surrounds a conductor carrying a current ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Doubling the operating frequency of a capacitive circuit: doubles the amount of a capacitive reactance None of these has no effect on the capacitive reactance cuts the capacitive reactance in half multiplies the capacitive reactance by 6.28 doubles the amount of a capacitive reactance None of these has no effect on the capacitive reactance cuts the capacitive reactance in half multiplies the capacitive reactance by 6.28 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is a negative ion? An atom that contains more electrons than neutrons None of these An atom that contains more electrons than protons An atom that contains more protons than electrons An atom that contains more protons than neutrons An atom that contains more electrons than neutrons None of these An atom that contains more electrons than protons An atom that contains more protons than electrons An atom that contains more protons than neutrons ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A zener regulator has an input voltage from 15 to 20 V and a load current from 5 to 20 mA. If the zener voltage is 6.8 V, what value should the series resistor have? 550 Ohm 400 Ohm 310 Ohm 410 Ohm None of these 550 Ohm 400 Ohm 310 Ohm 410 Ohm None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Household light bulbs have a given power rating, and they operate at 120 V. Which one of the following equations most directly provides the current rating of these light bulbs? P = I2R I = P/E None of these P = E2/R P = IE P = I2R I = P/E None of these P = E2/R P = IE ANSWER DOWNLOAD EXAMIANS APP
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