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ASSIGNMENT ON PHYSICS Class:10 Date: 17-4-2017 Magnetic effects of electric current 1. The properties of magnetic field lines 2.Why don’t two magnetic lines of force intersect each other 3.Draw the magnetic field lines around a bar magnet 4.Name two safety measures commonly used in electric circuits and appliances 5.What precaution should be taken to avoid the over loading of domestic electric circuit 6.What is the unit of magnetic field 7.When does an electric short circuit occur 8.What is the function of an earth wire? why is it necessary to earth metallic appliances 9.What is an electromagnet 10.The magnetic field inside along straight solenoid is ___________ 11.Two circular coils A and B are placed closed to each other. If the current in the coil A is changed ,will some current be induced in the coil B? Give reason.