1. Which of the following is a vector quantity?
2. What is the magneto-motive force (mmf) of a wire with 8 turns carrying three amperes of current?
3. Magnetism of a magnet can be destroyed by
4. Strength of an electromagnet can be increased by
5. What is the magneto-motive force in a 75-turn coil of wire when there are 4 A of current through it?
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