Constant voltage - Study guides, Class notes & Summaries
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Test Bank For Dental Radiography principals and Techniques 5th edition by Joen Iannucci
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Chapter 03: Radiation Characteristics 
Iannucci: Dental Radiography, 5th Edition 
 
MULTIPLE CHOICE 
 
	1.	In dental radiography, the term ________ is used to describe the mean energy or penetrating ability of the x-ray beam. 
a. 
quality 
b. 
quantity 
c. 
intensity 
d. 
wavelength 
 
 
ANS:	A 
Quality is used to describe the mean energy or penetrating ability of the x-ray beam. Quantity refers to the number of x-rays produced. Intensity is defined as the product of the quantity and quality per...
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CWB 2 All Module Exams Latest Update with Verified Solutions
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CWB 2 All Module Exams Latest Update with Verified Solutions 
A Plasma is: 
A) A gas made up of positive ions and free electrons 
B) A liquid used to reduce adherence of spatter 
C) The main component in an inverter power source D) Always present in an electrical circuit A) A gas made up of positive ions and free electrons 
To increase melting rate (burn-off rate) in the shielded metal arc welding (SMAW) process, which polarity should be used? 
A) DCEP 
B) ACEP 
C) DCEN D) ACEP C) DCEN 
Which ty...
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ATT Test 8 (Latest 2024/ 2025 Update) Questions and Verified Answers| 100% Correct| Grade A
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ATT Test 8 (Latest 2024/ 2025 Update) Questions and Verified Answers| 100% Correct| Grade A 
 
Q: Which rectifier is the least efficient using only half the input? 
 
 
Answer: 
Half-wave 
 
 
 
Q: Which two rectifiers require two input signals 180 degrees out of phase? 
 
 
Answer: 
Full-wave and bridge 
 
 
 
Q: Which rectifier uses a center tapped transformer? 
 
 
Answer: 
Full wave 
 
 
 
Q: How is frequency determined for half wave rectifier? 
 
 
Answer: 
Output frequency is same as i...
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NATE Gas Heating Exam Verified Questions and answers 2023 Latest Update
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NATE Gas Heating Exam Verified 
Questions and answers 2023 
Latest Update 
Since 1992, the United States Department of Energy has required that all furnaces sold 
and installed from that date on must have an AFUE of no less than: 
A: 70% 
B: 75% 
C: 78% 
D: 80% - correct answer C: 78% 
Many pre-1992 furnaces have efficiencies around . 
A: 10% 
B: 40% 
C: 60% 
D: 80% - correct answer C: 60% 
Today, furnaces with AFUE ratings greater than are available. 
A: 85% 
B: 90% 
C: 100% 
D: 110% - correct ...
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CCDS IBHRE EXAM STUDY QUESTIONS AND ANSWERS 2024 GRADED A
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Rheobase - the lowest point on a strength duration curve at an infinitely long pulse duration 
 
Chronaxie time - the pulse width at twice the rheobase value. It approximates the most efficient stimulation pulse duration 
 
Charge (formula) - Charge= I(current) x T(time) 
 
Furman's formula - Energy(microjoules)= I(current)xV(voltage)xT(pulse width) 
 
Ohms law formula - Voltage(electromotive force)= I(current/flow of electrons) x R(resistance to current flow in ohms) 
 
Functional Refractory P...
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RNAS C Practice Test Review 437 Questions with Verified Answers,100% CORRECT
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RNAS C Practice Test Review 437 Questions with Verified Answers 
 
A capacitor and resisitor in parallel - CORRECT ANSWER will have same voltage across since in parallel. 
if in series, voltage drops would occur 
 
they can be treated together 
 
If the absolute pressure of a gas is increased from 3 atm to 4 atm at constant volume, then the absolute temperature of the gas will increase by: 
A. 25%. 
B. 33%. 
C. 67%. 
D. 75% - CORRECT ANSWER B. Assuming the validity of the Ideal-Gas law, PV = n...
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NEIEP 600 Final VERIFIED 100% SOLUTIONS 2023//2024 WITH DIAGRAM ILLUSTRATIONS
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Zener current will decrease 
Refer to figure 1. If the load resistance R2 is reduced by half what happens what happens to zener diode? 
 
 
4v 
Refer to figure 1. The zener diode is designed to breakdown at 6VDC what is the voltage drop across R1 with a constant DC supply of 10VDC 
 
30 rpm 
An elevators motor rotates at 1200 rpm at contract speed and is geard at a ratio of 40:1. If the motor turns 40 rpm the sheave turns 1 rpm. What is the actual speed of the drive sheave in rpms? 
Th...
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ATT Test 6 (Latest 2024/ 2025 Update) Questions and Verified Answers| 100% Correct| Grade A
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ATT Test 6 (Latest 2024/ 2025 Update) Questions and Verified Answers| 100% Correct| Grade A 
 
Q: What is JFET cutoff? 
 
 
Answer: 
a large negative gate voltage that increases junction barrier so much that current flow stops (vgg > vdd) 
 
 
 
Q: What is JFET saturation? 
 
 
Answer: 
A negative gate voltage so small that decreases the junction barrier to a point where it no longer decreases, constant current flow 
 
 
 
Q: What causes constant current flow in JFET? 
 
 
Answer: 
JFET satur...
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CWB 2 All Module Exams
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CWB 2 All Module Exams 
 
A Plasma is: 
 
A) A gas made up of positive ions and free electrons 
B) A liquid used to reduce adherence of spatter 
C) The main component in an inverter power source 
D) Always present in an electrical circuit - A) A gas made up of positive ions and free 
electrons 
 
To increase melting rate (burn-off rate) in the shielded metal arc welding (SMAW) process, 
which polarity should be used? 
A) DCEP 
B) ACEP 
C) DCEN 
D) ACEP - C) DCEN 
 
Which type of welding power so...
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IBHRE CEPS - Trouble Questions with 100% Complete Answers
- Exam (elaborations) • 10 pages • 2023
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IBHRE CEPS - Trouble Questions with 100% Complete Answers
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