Electronic Principles Which one of the following phrases best describes residual magnetism? The force of attraction between the poles of a permanent and temporary magnetic field Magnetism that remains in the core of an electromagnet after the current through the coil is turned off The amount of magnetic flux that is not confined to the core material of an electromagnet None of these The circular magnetic field that surrounds a conductor carrying a current The force of attraction between the poles of a permanent and temporary magnetic field Magnetism that remains in the core of an electromagnet after the current through the coil is turned off The amount of magnetic flux that is not confined to the core material of an electromagnet None of these The circular magnetic field that surrounds a conductor carrying a current ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A transformer has a primary voltage of 120 V rms and a secondary voltage of 25 V rms. If the secondary current is 1A rms, what is the primary current? None of these 300 mA 7.8 mA 200 mA 208 mA None of these 300 mA 7.8 mA 200 mA 208 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles When operating above its resonant frequency, a parallel RLC circuit has the characteristics of a: parallel RLC circuit operated above its resonant frequency purely resistive circuit parallel RC circuit parallel RL circuit None of these parallel RLC circuit operated above its resonant frequency purely resistive circuit parallel RC circuit parallel RL circuit None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles In a step-down transformer, which is larger? None of these Neither Impossible to say Primary voltage Secondary voltage None of these Neither Impossible to say Primary voltage Secondary voltage ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A dielectric material is: a good conductor None of these a good conductor of magnetic fields a good insulator a poor conductor of electrostatic fields a good conductor None of these a good conductor of magnetic fields a good insulator a poor conductor of electrostatic fields ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles An ideal voltage source has Zero internal resistance Infinite internal resistance None of these A load-dependent current A load dependent voltage Zero internal resistance Infinite internal resistance None of these A load-dependent current A load dependent voltage ANSWER DOWNLOAD EXAMIANS APP
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