Electronic Engineering Test Exam Questions And Answers Verified 100% Correct

Electronic Engineering Test Exam Questions And Answers Verified 100% Correct What is ESD? - ANSWER ELECTROSTATIC DISCHARGE: a brief an abrupt electric current that flows between two objects at DIFFERENT ELECTRICAL POTENTIALS which is caused by CONTACT, or INDUCED by AN ELECTROSTATIC field. What is a RESISTOR? - ANSWER Electronical device that RESISTS the FLOW of ELECTRICAL CURRENT. Symbol for: ZENNER DIODE - ANSWER x Definition of Zener Diode: - ANSWER Voltage Regulator, typically REVERSED BIASED. If reverse voltage of a circuit is INCREASED the zener begins to LEAK current until the breakdown voltage is where the current INCREASES DRAMATICALLY. Zener diode will CONDUCT to keep the voltage REGULATED. What is LED - ANSWER Light Emitting Diode emits different colors and are made of different semi-conductor materials, and require different energies to light them. The FLAT side of the LED is the NEGATIVE terminal and the LONGER LEG is the POSITIVE lead. What is a DIODE? - ANSWER Conducts electric current very EASILY in one direction and VERY POORLY in the other direction. Allows DC to pass. IF it is FORWARD BIASED it CONDUCTS with a .7VDC drop across it if it is made of SILILCON. .3V if made of GERMANIUM. Also known as a RECTIVIER because it will stop the flow of AC in one direction, creating a PULSATING DC wave or HALF WAVE. In the SYMBOL which looks like an ARROW, the arrow points to the NEGATIVE/ CATHODE terminal.The other terminal is POSITIVE or (ANODE) . On an actual diode a BAND indicates the NEGATIVE/CATHODE terminal. What is aBridge Rectifier? - ANSWER ... What is a Capacitor? - ANSWER ... What is PHASE? - ANSWER ... What does ELI mean? - ANSWER Voltage (E) leads Current (I) VOLTAGE WAVE: leads current wave by 90 degrees because the inductor RESISTS CURRENT. What does ICE mean? - ANSWER Current (I) leads Voltage(E) CAPACITIVE: Capacitor charges up with VOLTAGE which is why the Voltage FOLLOWS the CURRENT. Define RMS/EFFECTIVE VOLTAGE - ANSWER ... Define IMPEDANCE - ANSWER ... What does NPN stand for? - ANSWER ... What does PNP stand for? - ANSWER ... What are the three leads on a PNP, or NPN TRANSISTOR? - ANSWER EMITTER, BASE, AND COLLECTOR. On the symbol the Emitter is the one with the arrow, the Base is the sideway T, and the Collector is the third leg. What are Transistors made of? - ANSWER Germanium or Callium Arsenide. What are the three leads of a P-Mosfet or N-Mosfet TRANSISTOR called? - ANSWER Gate, Drain, and Source. What does MOSFET stand for? - ANSWER Metal Oxide Semiconductor Field Effect (transistor) State Ohm's law - ANSWER V=IXR R=V/I I=V/R If current goes down, what does resistance do? - ANSWER Reistance goes up If Voltage is CONSTANT and Resistance goes DOWN, what must Current do? - ANSWER Current HAS to go UP! What is the definition of a short circuit? - ANSWER Zero resistance. Circuit has high current, and zero resistance. What would cause Current to DECREASE in a circuit, IF Voltage remained CONSTANT? - ANSWER INCREASSE in Resistance What is a Transformer? - ANSWER An electrical device that transfers energy from one