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


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3. The current in the windings on a toroid is 2.0A. There are 400 turns and the mean circumferential length is 40cm. If the inside magnetic field is 1.0T, the relative permeability is near to . [AMU (Med.) 2002]


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4. 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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5. A proton moving with a constant velocity passes through a region of space without any change in its velocity. If E and B represent the electric and magnetic fields respectively, then this region of space may have . [IIT-JEE 1985; A]


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