West Bengal Police Constable Special Mock Test
Physics - Magnetism
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1) Which of the following materials is used for making permanent magnets?
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2) Which of the following correctly describes the magnetic field lines due to a bar magnet?
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3) Two parallel wires carry currents I₁ and I₂ in the same direction. What is the nature of the force between these wires?
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4) A magnet is pushed into a coil connected to a galvanometer. What is observed?
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5) What is the function of a commutator in a DC motor?
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6) What is the SI unit of magnetic susceptibility?
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7) Which of the following materials can be magnetized to become a temporary magnet?
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8) What is the term used to describe the opposition to the establishment of a magnetic field in a material?
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9) When a charged particle moves in a magnetic field, which of the following quantities remains constant?
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10) What is the primary cause of the Earth's magnetic field?
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