Electronic Principles What is the turns ratio of a power transformer that shows 50 V at its secondary winding when you apply 150 V to its primary winding? 43891 2 43922 3 None of these 43891 2 43922 3 None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles In a step-down transformer, which is larger? None of these Secondary voltage Primary voltage Impossible to say Neither None of these Secondary voltage Primary voltage Impossible to say Neither ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following equations most directly leads to the resistance of an ordinary household light bulb, assuming that you know the power and voltage rating? I = P/E P = E2/R R = E2/P None of these P = PR I = P/E P = E2/R R = E2/P None of these P = PR ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles An intrinsic semiconductor has some holes in it at room temperature. What causes these holes? Valence electrons Free electrons Thermal energy Doping None of these Valence electrons Free electrons Thermal energy Doping None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following statements applies to common, non-rechargeable flashlight batteries? Common flashlight batteries are primary dry-cell batteries None of these Common flashlight batteries are secondary wet-cell batteries Common flashlight batteries are primary wet-cell batteries Common flashlight batteries are secondary dry-cell batteries Common flashlight batteries are primary dry-cell batteries None of these Common flashlight batteries are secondary wet-cell batteries Common flashlight batteries are primary wet-cell batteries Common flashlight batteries are secondary dry-cell batteries ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The core of an electromagnet is said to be in saturation when: frequent changes in the direction of current through the coil causes heating effects in the core material an increase in current through the coil causes no further increase in the mmf changing the polarity of the current in the coil changes the polarity of the magnetic field around the core None of these the core is permitted to move freely within the coil frequent changes in the direction of current through the coil causes heating effects in the core material an increase in current through the coil causes no further increase in the mmf changing the polarity of the current in the coil changes the polarity of the magnetic field around the core None of these the core is permitted to move freely within the coil ANSWER DOWNLOAD EXAMIANS APP
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