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A 20-cm-long nichrome wire is connected across the terminals of a 1.5 V battery.
Part A
What is the current density inside the wire?
Part B
If the current in the wire is 2.0 A , what is the wire’s diameter?
♦ Relevant knowledgeIn electromagnetism, the term “current density” is the quantity of charge per minute moving through a particular section of a chosen cross-section. The formula of current density is J = I/A.
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