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Related Questions

• The magnetic induction in the region between the pole faces of an electromagnet is $0.7 weber/m^2$. The induced e.m.f. in a straight conductor 10 cm long, perpendicular to B and moving perpendicular both to magnetic induction and its own length with a velocity 2 m/sec is

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• When the number of turns in a coil is doubled without any change in the length of the coil, its self inductance becomes

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• Two rails of a railway track insulated from each other and the ground are connected to a milli voltmeter. What is the reading of voltmeter, when a train travels with a speed of 180 km/hr along the track. Given that the vertical component of earth's magnetic field is $0.2 \times {10^{ - 4}}weber/{m^2}$ and the rails are separated by 1 metre

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• A closely wound coil of 100 turns and area of cross-section $1\;c{m^2}$ has a coefficient of self-induction 1 mH. The magnetic induction in the centre of the core of the coil when a current of 2A flows in it, will be

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• The number of turns in the coil of an ac¬ generator is 5000 and the area of the coil is $0.25\,{m^2}$. The coil is rotated at the rate of 100 cycles/sec in a magnetic field of $0.2 W/{m^2}$. The peak value of the emf generated is nearly

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