Electricity and Electronics Exam #1, Exams of Nursing

Download Electricity and Electronics Exam #1 and more Exams Nursing in PDF only on Docsity! Electricity and Electronics Exam #1 guaranteed success rated A+ What form of electricity to batteries provide? - Correct Answer DC Which Greek philosopher is credited with discovering a key static electricity related effect? - Correct Answer Thales of Miletus discovered the effect of static electricity by noticing that rubbed amber attracted things. How did the word "electron" arise? - Correct Answer Greek word "Elektron", which is the former word for amber. Who coined term "electricus" and when? - Correct Answer William Gilbert coined "electricus" in 1600 while ordered by Queen Elizabeth to study electrostatics and magnetism. How did term "magnetic" arise? - Correct Answer Shepherd named Magnes, who discovered magnetite while herding sheep because his staff stuck to the rock. Electricity and Electronics Exam #1 guaranteed success rated A+ Other common name for magnetite - Correct Answer Lodestone What electricity related device did Otto von Guericke invent? - Correct Answer Static charge generator. Put hand on spinning wheel of sulphur. Helped show existence of electrical attraction and repulsion. What did Pieter Van Musschenbroek and team invent? - Correct Answer Leydon jar, which is also known as condenser or capacitor. (found in microphones, TVs, phones, computers) Who discovered that there are two kinds of electricity? - Correct Answer C. F. du Fay and Francis Mauksbee the Elder discovered there were two electrical fluids that neutralized each other -- discovery of positive and negative charges. Who proposed concept of positive and negative charges? - Correct Answer Ben Franklin. Also gave the name battery and defined lighting Electricity and Electronics Exam #1 guaranteed success rated A+ What did Theophastus discover? - Correct Answer Other substances have similar magnetic power to amber, which attracted things when rubbed What is electricity? - Correct Answer flows of charged particles (usually electrons) What is a capacitor? - Correct Answer two oppositely charged plates with a wire Who is James Watt? - Correct Answer Developed steam engine What is a Leydon Jar? - Correct Answer two metal plates separated by an insulator (glass) used to store charge in attraction between plates (gave scientists a way to store electrical charges). Invented by Musschenbroek Electricity and Electronics Exam #1 guaranteed success rated A+ What did Alexander Neckham do in 1187? - Correct Answer Made a compass What did Charles Augustin de Coulomb do in 1776? - Correct Answer Utilized torsion balance to accurately measure force between electric and confirmed that the force was proportional to the product of individual charges and inversely proportional to square of distance between them. Measure of Charge (Q) - Correct Answer Coulombs (C) Measure of Resistance (R)/"Load" - Correct Answer Ohms Ω Measure of Voltage - Correct Answer Volts (V) V= 1Joule/Coulomb Measure of Current - Correct Answer Amps (A). Electricity and Electronics Exam #1 guaranteed success rated A+ 1A=1C/second 1Amp=1Volt/Ohm I=DQ/DT (change in charge over change in time) Measure of Energy - Correct Answer Jules (J) Measure of Force - Correct Answer Newtons (N) Ohm's Law - Correct Answer I=V/R = predict current V=I*R = predict voltage R=V/I = predict resistance What is voltage? - Correct Answer Electrical Pressure, energy/charge delivered. How much energy it takes to move a volt around the circuit. "energy per unit charge" Electricity and Electronics Exam #1 guaranteed success rated A+ Who is Sir Humphry Davy? - Correct Answer used electrolysis to discover many new elements and explored principles behind voltaic pile. Hired Michael Faraday as his assistant What does it mean if something is "ohmic"? - Correct Answer Resistance is constant. (If something is non-ohmic, it means the resistance IS NOT constant) What happens if wires/conductors get hot? - Correct Answer Resistance goes UP What form of power is used in most power delivery networks? - Correct Answer Alternating Current (AC) Who championed DC power over AC? - Correct Answer Thomas Edison Electricity and Electronics Exam #1 guaranteed success rated A+ Who championed AC power over DC? - Correct Answer Benjamin Franklin Can AC and DC behaviors essentially coexist in the same circuit? - Correct Answer yes What is "transient behavior"? - Correct Answer Transitional, behavior that is not steady or cyclical over time What happens when two charges if they are placed in close proximity to each other? - Correct Answer The force becomes extremely large. If charges are far apart the force is negligible. Compared to the number 100, are there a large number of electrons in one Coulomb? - Correct Answer Yes Electricity and Electronics Exam #1 guaranteed success rated A+ Where are the protons, neutrons, and electrons in an atom? - Correct Answer Protons and neutrons are in the nucleus, electrons orbit on the outside of nucleus in an electron cloud Which part of an atom flows easily in metals such as copper? - Correct Answer Electrons Glass and rubber are strong (insulators or conductors) - Correct Answer Insulators "Conventional Current Flow Direction" refers to direction flow (or what is effectively the direction of flow) of the ..... (positive or negative charges) - Correct Answer POSITIVE charges Are "volts", "ohms", "amps", "watts", and "Joules" all named after people? - Correct Answer YES. volts-Allessandro Volta; ohms-Georg Simon Ohm; amps-André-Marie Ampére; watts-James Watt; Joules- James Prescott Joule Electricity and Electronics Exam #1 guaranteed success rated A+ Active components - Correct Answer enable one current to control another. Usually have three terminals. Have control signal and controlled signal. Passive components - Correct Answer DOES NOT enable one current to control another What does the I-V curve of an incandescent light bulb do as it moves toward a higher voltage? - Correct Answer It gets flatter -- the slope decreases. What does the I-V curve of an ideal voltage source look like? - Correct Answer A vertical line, because that means the voltage does not change What does the I-V curve of an ideal current source look like? - Correct Answer A horizontal line Electricity and Electronics Exam #1 guaranteed success rated A+ What does the I-V curve of a solar cell look like? - Correct Answer Initially horizontal, then becoming vertical What is a solar cell? - Correct Answer "Photovoltaic cell". Device that converts light into electricity through photovoltaic effect. Is a battery or a solar panel in the sun more likely to cause an explosion if you short it out? - Correct Answer A battery. It's a chemical reaction. Is a current source or a voltage source designed to provide variable levels of current (within some range)? - Correct Answer a VOLTAGE source Valid formula for the power dissipated in resistor - Correct Answer P=(I^2)R Electricity and Electronics Exam #1 guaranteed success rated A+ When measuring current directly through component, where should the terminals of the multimeter be? - Correct Answer Inserted in series with the component When measuring the voltage across a component, where should the terminals of the multimeter be? - Correct Answer Placed across component (in parallel) Formula for calculating current - Correct Answer I=V/R (Correct Answer in Amps) Formula for power dissipation in circuit - Correct Answer P=I*V (Correct Answer in Watts) Formula to calculate how much energy is dissipated in circuit over given time - Correct Answer DE=P*t Change in energy=Power*time (in seconds) Electricity and Electronics Exam #1 guaranteed success rated A+ 10^-3=1e-3 Abbreviated with m What does the metric prefix "micro" mean and what is its abbreviation? - Correct Answer millionTH 0.000001 10^-6=1e-6 Abbreviated with μ (mu) What does the metric prefix "nano" mean and what is its abbreviation? - Correct Answer billionTH 0.000000001 10^-9=1e-9 Abbreviated with n Electricity and Electronics Exam #1 guaranteed success rated A+ What does it mean if two components are in parallel? - Correct Answer two or more components are connected on BOTH SIDES to same pair of nodes What does it mean if two components are in series? - Correct Answer Two components are connected to same trivial node with NO branches What is a trivial node? - Correct Answer A trivial node is the junction of two components What is a node? - Correct Answer Where current splits