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Physics - Magnetic Effect of Current Questions and Answer >>

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1. A solenoid is 1.0 metre long and it has 4250 turns. If a current of 5.0 ampere is flowing through it, what is the magnetic field at its centre [ μ₀ = 4π * 10 -7 weber / m² ]. [MP PMT 1996]

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2. A wire in the form of a circular loop of one turn carrying a current produces a magnetic field B at the centre. If the same wire is looped into a coil of two turns and carries the same current, the new value of magnetic induction at the centre is . [CBSE 2002; KCET]

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3. An electron enters a magnetic field whose direction is perpendicular to the velocity of the electron. Then . [MP PMT 1996; CB]

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4. Two concentric circular coils of ten turns each are situated in the same plane. Their radii are 20 and 40 cm and they carry respectively 0.2 and 0.3 ampere current in opposite direction. The magnetic field in weber / m² at the centre is . [MP PMT 1994]

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5. 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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