Science : Ch 13 – Magnetic Effects of Electric Current

Commercial electric motors neglect :

Which of the subsequent is not attracted by a magnet:

The magnetic field lines:

A current through a horizontal power line flows from south to North direction. The direction of magnetic field line 0.5m above it is:

When current is parallel to magnetic field, then force experience by the current carrying conductor placed in uniform magnetic field is

Direction of rotation of a coil in electric motor is intent by:

In electric motor, to make the coil rotating constantly in the identical direction, current is reversed in the coil after every half rotation by a device called:

The instrument that use to direct electric current in the circuit is known as:

The current which is created due to the relative motion of coil or magnet

The name of the effect being produced by the moving magnet

when an iron core is inserted into a current carrying solenoid

Example of permanent magnet is

To determine the direction of force experienced by a current carrying conductor placed in a uniform magnetic feld.

The change in magnetic feld lines in a coil is the cause of induced electric current in it. Name the underlying phenomenon.

The phenomenon discovered by Faraday.