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Physics - Magnetic Effect of Current Questions and Answer >>

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1. An electron is travelling horizontally towards east. A magnetic field in vertically downward direction exerts a force on the electron along. [EAMCET 1984]


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2. A circular coil of radius R carries an electric current. The magnetic field due to the coil at a point on the axis of the coil located at a distance r from the centre of the coil, such that r >> R, varies as . [EAMCET 1987; AI]


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3. The direction of magnetic lines of forces close to a straight conductor carrying current will be . [RPMT 2002; RPET]


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4. In the above question, the magnetic induction at O due to the whole length of the conductor is . [MP PMT/PET 1998]


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5. A long copper tube of inner radius R carries a current i. The magnetic field B inside the tube is . [MP PMT 1995]


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