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? 310 Ohm 410 Ohm 550 Ohm 400 Ohm None of these 310 Ohm 410 Ohm 550 Ohm 400 Ohm None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Suppose a step-down transformer has a turns ration of 5:1. If the secondary current is 1A rms, what is the primary-current? 0.3 A 0.6 A 0.4 A None of these 0.2 A 0.3 A 0.6 A 0.4 A None of these 0.2 A 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? I = P/E P = E2/R P = IE None of these P = I2R I = P/E P = E2/R P = IE None of these P = I2R ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the phase shift between total current and voltage, if 100 ohm resistor connected in parallel with an inductor that has a reactance of 200W? 26.6 degree 90 degree 0 degree None of these 180 degree 26.6 degree 90 degree 0 degree None of these 180 degree ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Doubling the operating frequency of a purely inductive circuit: 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 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 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles When the graph of current versus voltage is a straight line, the device is referred to as Linear Bipolar None of these Active Nonlinear Linear Bipolar None of these Active Nonlinear ANSWER DOWNLOAD EXAMIANS APP
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