Electronic Principles Which one of the following principles best describes the basic operation of an electromagnet? Current flowing through a conductor generates a magnetic field Like magnetic poles repel, while unlike poles attract None of these Like magnetic poles attract, while unlike poles repel Current is induced in a conductor that is moving through a magnetic field Current flowing through a conductor generates a magnetic field Like magnetic poles repel, while unlike poles attract None of these Like magnetic poles attract, while unlike poles repel Current is induced in a conductor that is moving through a magnetic field ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Most AC power is obtained from: lightning batteries oscillators generators None of these lightning batteries oscillators generators None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles An intrinsic semiconductor has some holes in it at room temperature. What causes these holes? Free electrons Thermal energy Valence electrons Doping None of these Free electrons Thermal energy Valence electrons Doping None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Reducing the amount of current through an inductor: None of these reduces the value of inductance by one-half has no effect on the inductance multiplies the value of inductance by four multiplies the value of inductance by two None of these reduces the value of inductance by one-half has no effect on the inductance multiplies the value of inductance by four multiplies the value of inductance by two ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which is the most widely used semiconductor? Silicon Copper None of these Germanium All of these Silicon Copper None of these Germanium All of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Doubling the diameter of the coil in an inductor: None of these reduces the value of inductance by one-fourth multiplies the value of inductance by four multiplies the value of inductance by two reduces the value of inductance by one-half None of these reduces the value of inductance by one-fourth multiplies the value of inductance by four multiplies the value of inductance by two reduces the value of inductance by one-half ANSWER DOWNLOAD EXAMIANS APP
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