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 None of these 7.8 mA 300 mA 200 mA 208 mA None of these 7.8 mA 300 mA 200 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Doubling the operating frequency of a purely inductive circuit: has no effect on the current through the inductors increases the current, but by an amount that can be determined only by doing a complete analysis of the circuit doubles the amount of current through the inductors cuts the current through the inductors one-half None of these has no effect on the current through the inductors increases the current, but by an amount that can be determined only by doing a complete analysis of the circuit doubles the amount of current through the inductors cuts the current through the inductors one-half None of these 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? P = I2R P = E2/R P = IE None of these I = P/E P = I2R P = E2/R P = IE None of these I = P/E ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A device that converts chemical energy to electrical energy is called a: electric device None of these solar cell chemical cell thermocouple electric device None of these solar cell chemical cell thermocouple ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A current source has an internal resistance of 100 kW. What is the largest load resistance if the current source must appear stiff? 20 k Ohm 2 k Ohm 1 k Ohm None of these 10 k Ohm 20 k Ohm 2 k Ohm 1 k Ohm None of these 10 k Ohm ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The direction of electron current flow is: from negative to positive from positive to negative from right to left from neutral to positive None of these from negative to positive from positive to negative from right to left from neutral to positive None of these ANSWER DOWNLOAD EXAMIANS APP
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