Electronic Principles The core of an electromagnet is said to be in saturation when: the core is permitted to move freely within the coil frequent changes in the direction of current through the coil causes heating effects in the core material None of these an increase in current through the coil causes no further increase in the mmf changing the polarity of the current in the coil changes the polarity of the magnetic field around the core the core is permitted to move freely within the coil frequent changes in the direction of current through the coil causes heating effects in the core material None of these an increase in current through the coil causes no further increase in the mmf changing the polarity of the current in the coil changes the polarity of the magnetic field around the core ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The total impedance of a parallel RLC circuit: always increases as the applied frequency increases None of these is equal to the sum of the values of resistance, inductive reactance and capacitive reactance always decreases as the applied frequency increases is maximum at the resonant frequency always increases as the applied frequency increases None of these is equal to the sum of the values of resistance, inductive reactance and capacitive reactance always decreases as the applied frequency increases is maximum at the resonant frequency ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A circuit has a Norton current of 10 mA and a Norton resistance of 10 kW. What is the Thevenin circuit? 1000 V and a parallel resistance of 10 kOhm 100 V and a series resistance of 10 k Ohm 100 V and a parallel resistance of 10 k Ohm None of these 1000 V and a series resistance of 10 k Ohm 1000 V and a parallel resistance of 10 kOhm 100 V and a series resistance of 10 k Ohm 100 V and a parallel resistance of 10 k Ohm None of these 1000 V and a series resistance of 10 k Ohm ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is a negative ion? An atom that contains more protons than electrons An atom that contains more protons than neutrons None of these An atom that contains more electrons than protons An atom that contains more electrons than neutrons An atom that contains more protons than electrons An atom that contains more protons than neutrons None of these An atom that contains more electrons than protons An atom that contains more electrons than neutrons ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Doubling the operating frequency of a capacitive circuit: has no effect on the capacitive reactance cuts the capacitive reactance in half doubles the amount of a capacitive reactance None of these multiplies the capacitive reactance by 6.28 has no effect on the capacitive reactance cuts the capacitive reactance in half doubles the amount of a capacitive reactance None of these multiplies the capacitive reactance by 6.28 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Suppose a voltage source has an ideal voltage of 15V and a source resistance of 0.2W. For what values of load resistance will the voltage source appear stiff? 100 Ohm 20 Ohm 30 Ohm None of these 10 Ohm 100 Ohm 20 Ohm 30 Ohm None of these 10 Ohm ANSWER DOWNLOAD EXAMIANS APP
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