Question
A recantagular coil of length and width having 50 turns of wire is suspended vertically in unifrom magnetic field of srenght 0.2 . The coil carres a current of 2 A. If the plane of the coil is inclined at an angl,e of with the direction of the feld the torque required to keep the coil in stable equilibrium will be
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CBSE AIPMT 2015
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Two identical circular loops of metal wire are lying on a table without touching each other. Loop A carries a current which increases with time. In response, the loop B Question 2
A small town with a demand of 800 kW of electric power at 220 V is situated 15 km away from an electric plant generating power at 440 V.The resistance of the two wire line carrying power is 0.5 per km.The town gets power from the line through a 4000-220 V step-down transformer at a sub-station in the town.(a) Estimate the line power loss in the form of heat.
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(c) Characterise the step up transformer at the plant.
Question 3
A coil of metal wire is kept stationary in a non-uniform magnetic field. An e.m.f. Is induced in the coil.Question 4
Do the same exercise as above with the replacement of the earlier transformer by a 40,000-220 V step-down transformer (Neglect, as before, leakage losses though this may not be a good assumption any longer because of the very high voltage transmission involved).Hence, explain why high voltage transmission is preferred?Exercise:
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A small town with a demand of 800 kW of electric power at 220 V is situated 15 km away from an electric plant generating power at 440 V.The resistance of the two wire line carrying power is 0.5 per km.The town gets power from the line through a 4000-220 V step-down transformer at a sub-station in the town.
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Question Text | A recantagular coil of length and width having 50 turns of wire is suspended vertically in unifrom magnetic field of srenght 0.2 . The coil carres a current of 2 A. If the plane of the coil is inclined at an angl,e of with the direction of the feld the torque required to keep the coil in stable equilibrium will be |
Answer Type | Text solution:1 |
Upvotes | 150 |