Textbook Question
3.5×1010 electrons are added to a plastic rod by rubbing it with wool. What is the charge on the rod?
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24. Electric Force & Field; Gauss' Law
Electric Charge
Multiple Choice
Which of the following is not an advantage of an arc welding machine?
A
Lower cost compared to machines
B
Consistent arc stability with all electrode types
C
Ability to weld non-ferrous metals
D
Simpler construction and maintenance
Verified step by step guidance1
Understand the context of AC arc welding machines: AC (Alternating Current) arc welding machines are commonly used in welding processes due to their ability to handle various types of welding tasks.
Identify the advantages of AC arc welding machines: Typically, AC machines are known for their lower cost compared to DC machines, simpler construction and maintenance, and ability to weld non-ferrous metals.
Consider the concept of arc stability: Arc stability refers to the consistency and reliability of the welding arc during the welding process. It is crucial for producing high-quality welds.
Evaluate the statement about arc stability: AC machines generally have less consistent arc stability compared to DC machines, especially with certain electrode types. This is due to the alternating nature of the current, which can affect the arc's steadiness.
Conclude which statement is not an advantage: Based on the evaluation, the statement 'Consistent arc stability with all electrode types' is not an advantage of AC arc welding machines, as AC machines may struggle with arc stability compared to DC machines.
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