Electronic Principles Which one of the following phrasers best describes flux density? The force that maintains lines of force The concentration of lines of magnetic force None of these The rate of change of the number of lines of magnetic force The opposition to a build-up of magnetic fields The force that maintains lines of force The concentration of lines of magnetic force None of these The rate of change of the number of lines of magnetic force The opposition to a build-up of magnetic fields ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A device that converts mechanical into electrical energy is? thermocouple solar cell chemical cell None of these generator thermocouple solar cell chemical cell None of these generator ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A step-up transformer has a turns ratio of 1:4. If the line voltage is 115 V rms, what is the peak secondary voltage? 208 V None of these 707 V 651 V 700 V 208 V None of these 707 V 651 V 700 V 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 None of these 20 k Ohm 2 k Ohm 1 k Ohm 10 k Ohm None of these 20 k Ohm 2 k Ohm 1 k Ohm ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following phrases most accurately describes a purely inductive circuit? None of these Inductive reactance provides the only opposition to current flow Resistances provide the only opposition to current flow The ac voltage lags the current by 90 degree Combinations of resistance and inductive reactance provide any opposition to current flow None of these Inductive reactance provides the only opposition to current flow Resistances provide the only opposition to current flow The ac voltage lags the current by 90 degree Combinations of resistance and inductive reactance provide any opposition to current flow ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles How much current flows through a 0.02-H choke that is operating from a 12-V ac, 100-Hz source? 2.02 A None of these 0.955 A 0.41666666666667 0.02 A 2.02 A None of these 0.955 A 0.41666666666667 0.02 A ANSWER DOWNLOAD EXAMIANS APP
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