An electric current through a copper wire:

Related MCQs

• The approximate radiographic equivalence factors for steel and copper at 220 kV are 1.0 and 1.4 respectively. If it is desirable to radiograph a 1.27 cm (0.5 inch) piece of copper, what thickness of steel would require about the same exposure characteristics?
• In which magnetizing method is the current passed directly through the part, thereby setting up a magnetic field at right angles to the current flow?
• A wire brush should be used for pre-cleaning:
• What is the danger associated with using a wire brush during pre-cleaning?
• The important difference between AC and DC current for magnetic particle testing purposes is:
• The most common source of DC current for magnetic particle testing is:
• Fields generated in ferromagnetic material with AC current are useful for locating:
• A common rule of thumb to use for current required in circular magnetisation:
• The formula, NI = 45000/(L/D), is used to calculate the proper magnetising current for:
• The formula, NI = 45000/(L/D), gives proper magnetising current for a coil, regardless of coil size as long as: