Electronic Principles A certain electromagnet has 1000 turns of wire. How much current must flow through the coil in order to generate an mmf of 100 ampere-turns? 1000 A 0.41666666666667 100 A None of these 0.1 A 1000 A 0.41666666666667 100 A None of these 0.1 A ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the turns ratio for the transformer specified in the above question? None of these 0.707 0.575 10.738 1.5 None of these 0.707 0.575 10.738 1.5 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 Combinations of resistance and inductive reactance provide any opposition to current flow The ac voltage lags the current by 90 degree None of these Inductive reactance provides the only opposition to current flow Resistances provide the only opposition to current flow Combinations of resistance and inductive reactance provide any opposition to current flow The ac voltage lags the current by 90 degree ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Doubling the operating frequency of a purely inductive circuit: None of these increases the current, but by an amount that can be determined only by doing a complete analysis of the circuit cuts the current through the inductors one-half has no effect on the current through the inductors doubles the amount of current through the inductors None of these increases the current, but by an amount that can be determined only by doing a complete analysis of the circuit cuts the current through the inductors one-half has no effect on the current through the inductors doubles the amount of current through the inductors ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The nucleus of the copper atom contains how many protons? 4 18 None of these 1 29 4 18 None of these 1 29 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Doubling the operating frequency of a capacitive circuit: doubles the amount of a capacitive reactance multiplies the capacitive reactance by 6.28 cuts the capacitive reactance in half has no effect on the capacitive reactance None of these doubles the amount of a capacitive reactance multiplies the capacitive reactance by 6.28 cuts the capacitive reactance in half has no effect on the capacitive reactance None of these ANSWER DOWNLOAD EXAMIANS APP
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