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Electronic Principles - Section 3 :: Discussion
| 2. | The core of an electromagnet is said to be in saturation when: | |
| A. | the core is permitted to move freely within the coil | |
| B. | an increase in current through the coil causes no further increase in the mmf | |
| C. | frequent changes in the direction of current through the coil causes heating effects in the core material | |
| D. | changing the polarity of the current in the coil changes the polarity of the magnetic field around the core | |
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