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Physics - Magnetic Effect of Current Questions and Answer >>

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1. 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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2. 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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3. An electron enters a region where magnetic (B) and electric (E) fields are mutually perpendicular to one another, then . [CBSE PMT1993]


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4. A solenoid of 1.5 metre length and 4.0 cm diameter posses 10 turn per cm. A current of 5 ampere is flowing through it. The magnetic induction at axis inside the solenoid is . [CPMT 1990]


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5. 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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