Magnetism & Electromagnetism – HI MCQ!

When an iron piece is placed in a magnetic field?

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The electromagnet has 50 turns and a current of 1 A flows through the coil. If the length of the magnet circuit is 200 mm, what is the magnetic field strength?

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Which of the following is the unit of magnetic flux density?

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Out of the following statements, concerning an electric field, which statement is not true?

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A magnetic field exists around?

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If a copper disc isrotated rapidly below a freely suspended magnetic needle, the magnetic needle shall start rotating with a velocity?

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What will be the current passing through the ring shaped air cored coil when number of turns is 800 and ampere turns are 3200?

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Gilbert is a unit of?

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The magnetism left in the iron after exciting field has been removed is known as?

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The most effective and quickest way of making a magnet from soft iron is by?

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