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Physics - Magnetic Effect of Current Questions and Answer >>

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1. A charged particle enters a magnetic field H with its initial velocity making an angle of with H. The path of the particle will be . [MP PET 1999; AI]

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2. A length L of wire carries a steady current I. It is bent first to form a circular plane coil of one turn. The same length is now bent more sharply to give a double loop of smaller radius. The magnetic field at the centre caused by the same current is . [NCERT 1980; AII]

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3. A charged particle moves in a uniform magnetic field. The velocity of the particle at some instant makes an acute angle with the magnetic field. The path of the particle will be . [MP PMT 1999]

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4. A conducting circular loop of radius r carries a constant current i. It is placed in a uniform magnetic field B, such that B is perpendicular to the plane of the loop. The magnetic force acting on the loop is . [IIT 1983; MP PM]

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5. Two straight horizontal parallel wires are carrying the same current in the same direction, d is the distance between the wires. You are provided with a small freely suspended magnetic needle. At which of the following positions will the orientation of the needle be independent of the magnitude of the current in the wires. [NCERT 1983]

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