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Physics with Akhtiar Ali Bullo
  • 2 years ago
Fan works on the principle of
Pankha kis principle pe kaam karta hai
EMI mcqs
Physics class 12th mcqs

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A wire 1.80m long carries a current of 13.0A and makes an angle of 35.0⁰ with a uniform magnetic field of magnitude B=1.50T.Calculate the magnetic force on the wire
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The poles of a horse shoe magnet measures 8cm × 3.2cm the magnetic flux density between the magnet poles is 80mT.Outside of the magnet the magnetic flux density is zero.Calculate the magnetic flux between the poles of a magnet.
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An aluminum window has a width of 60cm and length of 85cm as shown in the figure. a.When the window is closed the magnetic flux density is 1.8×10^-4 T is normal to window. b.Calculate the magnetic flux through the window.
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A heat engine performs work of 0.4166 watts in one hour and rejects 4500J of heat to the sink.What is the efficiency of engine ?
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Temperature difference between the surface water and bottom water in Manchester lake might be 5 degree centigrade Assuming the surface water to be at 20 degree celsius.What highest efficiency a steam engine could have if it operates between these two tem
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In a high pressure steam turbine engine, the steam is heated to 600 degree centigrade and exhausted at about 90 degree centigrade.what is the highest possible efficiency of any engine that operates between these two temperatures?
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