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? 300 mA 200 mA 208 mA 7.8 mA None of these 300 mA 200 mA 208 mA 7.8 mA None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following properties of a magnetic circuit can be directly compared to current in an electrical circuit? Number of lines of force None of these Magnetomotive force Flux density Reluctance Number of lines of force None of these Magnetomotive force Flux density Reluctance ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles 1 Microfarad is the same as: None of these 1 million farads 1 millionth of a picofarad 1 million picofarads 1000 millifarads None of these 1 million farads 1 millionth of a picofarad 1 million picofarads 1000 millifarads ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Suppose a current source has an Ideal current of 10 mA and an internal resistance of 20 MW. For what values of load resistance will the current source appear stiff? None of these 20 k Ohm or more 200 k Ohm or less 20 km or less 200 k Ohm or more None of these 20 k Ohm or more 200 k Ohm or less 20 km or less 200 k Ohm or more ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following phrasers best describes flux density? The opposition to a build-up of magnetic fields The rate of change of the number of lines of magnetic force The force that maintains lines of force None of these The concentration of lines of magnetic force The opposition to a build-up of magnetic fields The rate of change of the number of lines of magnetic force The force that maintains lines of force None of these The concentration of lines of magnetic force ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A transistor has a current gain of 125 and a base current of 30 µA. What is the collector current? None of these 13 mA 3.75 mA 0.05 mA 3.2 mA None of these 13 mA 3.75 mA 0.05 mA 3.2 mA ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS