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 None of these 400 Ohm 550 Ohm 310 Ohm 410 Ohm None of these 400 Ohm 550 Ohm ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The secondary voltage for a certain power transformer is twice the voltage applied to the primary. The current flowing in the secondary winding will be: Same as the primary current No more than 10% less than the primary current None of these One-half the primary current Twice the primary current Same as the primary current No more than 10% less than the primary current None of these One-half the primary current Twice the primary current ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The rms value of a sine waveform is: the number of cycles completed in one second equal to 0.707 times the peak amplitude equal to 1.41 times the peak amplitude the time required to complete one full cycle None of these the number of cycles completed in one second equal to 0.707 times the peak amplitude equal to 1.41 times the peak amplitude the time required to complete one full cycle None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles To get the Thevenin voltage, you have to Short the voltage source None of these Short the load resistor Open the voltage source Open the load resister Short the voltage source None of these Short the load resistor Open the voltage source Open the load resister ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Suppose the peak value of a sinusoidal voltage is 50 V. What is the rms value? 30.4 V None of these 35.4 V 37.4 V 38.74 V 30.4 V None of these 35.4 V 37.4 V 38.74 V ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A diode is in series with 220W. If the voltage across the resister is 4V, what is the current through the diode? 16.3 mA 55.86 A 18.2 mA 55 A None of these 16.3 mA 55.86 A 18.2 mA 55 A None of these ANSWER DOWNLOAD EXAMIANS APP
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