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? 300 mA 7.8 mA 200 mA None of these 208 mA 300 mA 7.8 mA 200 mA None of these 208 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following is a direct statement of Ohm's law? The algebraic sum of currents entering and leaving a point is equal to zero The algebraic sum of voltages in a loop is equal to zero The total resistance of a parallel circuit is less than the value of the smallest resistance The voltage drop across a resistance is proportional to the value of resistance and the amount of current flowing through it None of these The algebraic sum of currents entering and leaving a point is equal to zero The algebraic sum of voltages in a loop is equal to zero The total resistance of a parallel circuit is less than the value of the smallest resistance The voltage drop across a resistance is proportional to the value of resistance and the amount of current flowing through it None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The current gain of a transistor is defined as the ratio of the collector current to the supply current emitter current collector current None of these base current supply current emitter current collector current None of these base current ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The valence electron of a copper atom experiences what kind of attraction toward the nucleus? Strong None of these Weak Neutral Impossible to say Strong None of these Weak Neutral Impossible to say ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles When the collector current increases, what does the current gain do? increases decreases any of the above stays the same None of these increases decreases any of the above stays the same None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A farad is defined as the amount of capacitance necessary for: dissipating 1 W of power causing an ac phase shift greater than 90 degree None of these storing 1 V for 1 second changing the voltage on the plates at the rate of 1 V per second when 1 A of current is flowing dissipating 1 W of power causing an ac phase shift greater than 90 degree None of these storing 1 V for 1 second changing the voltage on the plates at the rate of 1 V per second when 1 A of current is flowing ANSWER DOWNLOAD EXAMIANS APP
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