Magnetism & Electromagnetism – Page 2 – HI MCQ!

Fleming’s left hand rule is used to find?

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A 300 mm long conductor is carrying a current of 10 A and is situated at right angles to a magnetic field having a flux density of 0.8 T ; the force on the conductor will be?

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Hysteresis loop in case of magnetically hard materials is more …… in shape as compared to magnetically soft materials?

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Air gap has …… reluctance as compared to iron or steel path?

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The retentivity (a property) of material is useful for the construction of?

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A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be?

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Core of an electromagnet should have?

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A certain amount of current flows through a ring-shaped coil with fixed number of turns. How does the magnetic induction B varies inside the coil if an iron core is threaded into coil without dimensional change of coil?

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Magnetic moment is a?

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The two conductors of a transmission line carry equal current I in opposite directions. The force on each conductor is?

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