Electronic Principles Current is The force that causes electrons to flow The flow of charged particles through a material The number of free electrons in an atom An imbalance of electrical charges None of these The force that causes electrons to flow The flow of charged particles through a material The number of free electrons in an atom An imbalance of electrical charges None of these ANSWER DOWNLOAD EXAMIANS APP
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? 10 k Ohm 20 k Ohm 2 k Ohm None of these 1 k Ohm 10 k Ohm 20 k Ohm 2 k Ohm None of these 1 k Ohm ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the impedance of a circuit composed of a 100 ohm resistor connected in parallel with a capacitor that has a reactance of 100 ohm? 250 Ohm 70.7Ohm 99.3 Ohm 60 Ohm None of these 250 Ohm 70.7Ohm 99.3 Ohm 60 Ohm None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The core of an electromagnet is said to be in saturation when: the core is permitted to move freely within the coil changing the polarity of the current in the coil changes the polarity of the magnetic field around the core frequent changes in the direction of current through the coil causes heating effects in the core material an increase in current through the coil causes no further increase in the mmf None of these the core is permitted to move freely within the coil changing the polarity of the current in the coil changes the polarity of the magnetic field around the core frequent changes in the direction of current through the coil causes heating effects in the core material an increase in current through the coil causes no further increase in the mmf None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Reducing the amount of current through an inductor: reduces the value of inductance by one-half has no effect on the inductance None of these multiplies the value of inductance by four multiplies the value of inductance by two reduces the value of inductance by one-half has no effect on the inductance None of these multiplies the value of inductance by four multiplies the value of inductance by two ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following kinds of materials has the highest permeability? All of these A ferromagnetic material None of these A diamagnetic material A paramagnetic material All of these A ferromagnetic material None of these A diamagnetic material A paramagnetic material ANSWER DOWNLOAD EXAMIANS APP
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