Electronic Principles Which one of the following phrasers best describes flux density? The concentration of lines of magnetic force The force that maintains lines of force The rate of change of the number of lines of magnetic force None of these The opposition to a build-up of magnetic fields The concentration of lines of magnetic force The force that maintains lines of force The rate of change of the number of lines of magnetic force None of these The opposition to a build-up of magnetic fields ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Suppose a voltage source has an ideal voltage of 12V and an internal resistance of 0.5W. For what values of load resistance will the voltage source appear stiff? 50 Ohm or more 100 Ohm None of these 6 Ohm 5 Ohm 50 Ohm or more 100 Ohm None of these 6 Ohm 5 Ohm ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the phase shift between total current and voltage, if 100 ohm resistor connected in parallel with an inductor that has a reactance of 200W? 26.6 degree None of these 180 degree 0 degree 90 degree 26.6 degree None of these 180 degree 0 degree 90 degree ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is a free electron? An electron that has been freed from its parent atom An electron that costs nothing None of these An electron that has twice the amount of charge of a normal electron An electron that has no electrical charge An electron that has been freed from its parent atom An electron that costs nothing None of these An electron that has twice the amount of charge of a normal electron An electron that has no electrical charge ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A low-pass filter: has no effect on ac signals None of these passes higher-frequency signals and reduces lower-frequency signals passes lower-frequency signals and reduces higher-frequency signals reduces the level of all frequencies by a significant amount has no effect on ac signals None of these passes higher-frequency signals and reduces lower-frequency signals passes lower-frequency signals and reduces higher-frequency signals reduces the level of all frequencies by a significant amount ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles In a step-down transformer, which is larger? None of these Primary voltage Secondary voltage Neither Impossible to say None of these Primary voltage Secondary voltage Neither Impossible to say ANSWER DOWNLOAD EXAMIANS APP
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