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? None of these 2 k Ohm 20 k Ohm 10 k Ohm 1 k Ohm None of these 2 k Ohm 20 k Ohm 10 k Ohm 1 k Ohm ANSWER DOWNLOAD EXAMIANS APP
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? 200 mA None of these 7.8 mA 208 mA 300 mA 200 mA None of these 7.8 mA 208 mA 300 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The primary impedance of a transformer is 60 ohm and the secondary impedance is 120 ohm. What is the impedance ratio? 0.25 180 4 0.5 None of these 0.25 180 4 0.5 None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following equations most directly leads to the resistance of an ordinary household light bulb, assuming that you know the power and voltage rating? R = E2/P None of these I = P/E P = E2/R P = PR R = E2/P None of these I = P/E P = E2/R P = PR ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The knee voltage of a diode is approximately equal to the Forward voltage None of these Breakdown voltage Applied voltage Barrier potential Forward voltage None of these Breakdown voltage Applied voltage Barrier potential ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Doubling the operating frequency of a capacitive circuit: multiplies the capacitive reactance by 6.28 None of these cuts the capacitive reactance in half has no effect on the capacitive reactance doubles the amount of a capacitive reactance multiplies the capacitive reactance by 6.28 None of these cuts the capacitive reactance in half has no effect on the capacitive reactance doubles the amount of a capacitive reactance ANSWER DOWNLOAD EXAMIANS APP
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