The magnetic lines of force inside a bar magnet:
Important Questions on Magnetic Effects of Electric Current
If the key in the arrangement is taken out, that is circuit is made open and the magnetic field lines are drawn over the horizontal plane . The lines are:
A circular loop placed in a perpendicular to the plane of paper carries a current when the key is ON, the current as seen from the point A to B (in the plane of the paper and on the axis of the coil) is anticlockwise and clockwise respectively. The magnetic field lines points from B to A. The North Pole of the resultant magnet is close to :
A: Magnetic flux can produce induced emf.
B: Faraday established induced emf experimentally.
A: A spark occur between the poles of a switch when the switch is opened.
B: Current flowing in the conductor produces magnetic field.
Match the following:
| Column | Column |
| A. Electric motor | . Indicate the presence of electricity |
| B. Generator | . Electrical energy into mechanical energy |
| C. Neon tester | . Mechanical energy into electrical energy |
A conducting wire is moving towards right in a magnetic field . The direction of induced current in the wire is shown in the figure. The direction of magnetic field will be :
