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Physics - Magnetic Effect of Current Questions and Answer >>

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1. The radius of curvature of the path of the charged particle in a uniform magnetic field is directly proportional to . [MNR 1995; UPSEA]


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2. Two free parallel wires carrying currents in opposite direction . [AFMC 2002; CPMT]


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3. 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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4. If a copper rod carries a direct current, the magnetic field associated with the current will be . [CPMT 1984]


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5. 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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