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A rectangular loop of sides 8 cm and 2 c...

A rectangular loop of sides 8 cm and 2 cm with a cut is stationary between the pole pieces of an electromagnet. The magnetic field of the magnet is normal to the loop. The current feeding the electromagnet is reduced so that the field decreases from its initial value of 0.3 T at the rate of `0.02 T s^-1`. If the cut is joined and the loop has a resistance of `1.6 Omega` , how much power is dissipated by the loop as heat? What is the source of this power?

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MODERN PUBLICATION-TEXTUAL QUESTIONS-EXERCISE
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  2. For current entering at A, the electric field E(r at a distance r form...

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  3. A material 'B' has twice the specific resistance of 'A'. A circular wi...

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  4. The length of a given cylindrical wire is increased by 100%. Due to th...

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  5. If a wire is stretched to make it 0.1% longer, its resistance of will

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  8. A strip of copper another of germanium are cooled from room temperatur...

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  9. The difference in the variation o resistance with temperature in a met...

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  10. The thermistors are usually made of

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  11. The resistance of a bulb filmanet is 100Omega at a temperature of 100^...

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  12. The resistance of a wire is 5 ohm at 50^@C and 6 ohm at 100^@C. The re...

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  13. The resistance of hot tungsten filament is about 10 times the cold res...

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  16. A heater coil is cut into two equal parts and only one part is now use...

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  17. If in the circuit, power dissipation is 150 W, then R is

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  18. A wire when connected to 220 V mains supply has power dissipation P1. ...

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  19. The resistance of the series combination of two resistances is S. WHen...

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