Magnetic field flows - Study guides, Class notes & Summaries

What are the two types of current use din the heating, cooling and refrigeration industries? AC (mostly) DC _____ current flows in only one direction. DC _____ current flows in alternating directions. AC What are the advantages of AC current over DC current? 1) cheaper 2) easier to produce 3) easier to transform from one voltage to another How is AC produced? by cutting through the magnetic field with a conductor What is a sine wave? a graphical representation o...

Electricity PREP TEST QUESTIONS WITH VERIFIED ANSWERS The size of the conductor is proportional to the amount of the current. True or False? - ANSWER True. What happens when a conductor moves relative to a magnetic field and it passes through the lines of magnetic flux? - ANSWER A voltage is induced in the conductor. What is Electro-magnetic Induction? - ANSWER As long as there is movement between a conductor and a magnetic field, an induced voltage is created. Describe what the ...

Physics Chapter 4 X-ray Circuit Exam Review Solution 2023 Qs&As Alternating Current (AC) - ANSWER-Electrical current that changes direction in cycles as the electric potential of the source changes Automatic Exposure Control (AEC) - ANSWER-A device that uses an ionization chamber to detect the quantity of radiation exposing the pt and IR Conductor - ANSWER-Material with an abundance of free electrons allowing free flow of electricity Current - ANSWER-An expression of the flow of electron...

What is the name of the invisible force that is created around the wire when electrons flow through a wire? Magnetic field What is electromagnetism? The creation of a magnetic field by the flow of electric current is referred to as electromagnetism. What does winding the conductor into a coil cause? Winding the conductor into a coil causes the magnetic field to become stronger. The ____________ of the field increases as the number of windings (turns) increases. Strength ...

JOURNEYMAN CLOSED BOOK # 3 Exam D -Answer-The electromotive force required to cause a current to flow may be obtained __________. I. Thermally II. Mechanically III. Chemically a. I only b. I & III only c. II & III only d. I, II, & III C -Answer-Which of the following is not true? a. A fluorescent fixture is more efficient than an incandescent fixture. b. Room temperature has an effect on the operation of a fluorescent lamp . c. Fluorescent fixtures have good power factor with the cu...

the reverse polarity indicator is an LED with 2 legs. One of these legs have a resistor of - Answer-25k Ohms Anodes used in cathodic protection systems shall be - Answer-painted with a protective barrier coating oil pressure and temperature gauges are - Answer-installed in series what type of element are in series - Answer-the switches voltage regulator ( inbetween output and breaker) - Answer-controls alternator field voltage isolator transformer - Answer-cleans signal how much is the i...

1. Which of the following describe when a non-ferrous object is repulsed by static magnetic field? a. Fourier transformation b. Lenz's force c. Ohm's law d. Larmor equation anwer b. Lenz's force 2. What is the FDA SAR limit for the whole body in first level controlled operating mode? a. 8 W/kg for 15 mins b. 4 W/kg for 15 mins c. 3 W/kg for 10 mins d. 7 W/kg for 20 mins anwer b. 4 W/kg for 15 mins 3. Gadolinium contains what kind of magnetism? a. Diamagnetic b. Paramagnetic c. Fe...

EEG- what does it stand for? correct answer: Electroencephalogram Electro- meaning electrical encephalo- meaning releating to the brain gram- measurement sometimes called electroencephalography Invention of EEG (who and why) correct answer: Hans Berger (1873-1941) A neurologist interested in extra-sensory perception Wanted to measure 'brainwaves' responsible for telepathy- this was because of a near death experience where he thought that he could telepathically communicate wit...

EARTH SCIENCE FINAL EXAM QUESTIONS AND ANSWERS List the 3 main layers of the earth from the center to the outside based on composition (what they are made out of). - Correct Answer ️️ -1). Core (Inner and outer)-solid inner liquide outer. Iron/nickel alloy. Extreme pressure 2).Mantle-82% of the earth's volume-Solid, rocky, shell 3). Crust (Oceanic-younger rocks and Continental-granite rocks) List the 5 mechanical layers of the earth (based on how they deform?) Whic layers is a liqui...

ARDMS (RVT) Ultrasound Vascular Registry Review Questions with 100% Correct answers Ultrasound Vascular Registry Review Questions with 100% Correct answers What is the first branch of the aortic arch? Innominate artery/ Brachiocephalic Name the three branches of the aortic arch? a. Innominate artery/ Brachiocephalic b. Lt CCA c. Lt Subclavian artery The radial artery runs on what side of the forearm? Lateral side The radial artery branches to form what part of the palmar arch? Supe...