emi

Related Questions

• A rectangular coil of 300 turns has an average area of average area of $25\;cm \times 10\;cm.$ The coil rotates with a speed of 50 cps in a uniform magnetic field of strength $4 \times {10^{ - 2}}T$ about an axis perpendicular of the field. The peak value of the induced e.m.f. is (in volt)

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• A coil of $40 \Omega$ resistance has 100 turns and radius 6 mm is connected to ammeter of resistance of 160 ohms. Coil is placed perpendicular to the magnetic field. When coil is taken out of the field, $32 \mu C$ charge flows through it. The intensity of magnetic field will be

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• Find out the e.m.f. produced when the current changes from 0 to 1 A in 10 second, given $L = 10 \mu H$

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• A rod of length 20 cm is rotating with angular speed of 100 rps in a magnetic field of strength 0.5 T about it’s one end. What is the potential difference between two ends of the rod

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• A solenoid has 2000 turns wound over a length of 0.30 metre. The area of its cross-section is $1.2 \times {10^{ - 3}}{m^2}$. Around its central section, a coil of 300 turns is wound. If an initial current of 2 A in the solenoid is reversed in 0.25 sec, then the e.m.f. induced in the coil is

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