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The magnetic field strength of an air-cored coil can be increased by | |
A. | increasing the number of turns on the coil. [Wrong Answer] |
B. | increasing the current strength. [Wrong Answer] |
C. | increasing the core x-sectional area. [Wrong Answer] |
D. | inserting a soft iron core into the coil. [Wrong Answer] |
E. | any of the above methods. [Correct Answer] |