Science : Ch 13 – Magnetic Effects of Electric Current

Inside the magnet, the field lines move from :

The magnetic feld inside a long straight solenoid carrying current is:

A soft iron bar is introduced inside the current carrying solenoid. The magnetic field inside the solenoid:

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

Which of the following component influence the strength of force experience by a current carrying conduct in a uniform magnetic field?

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 commercial motors use a soft iron core on which the coil is wound because

Example of permanent magnet is

A coil of many circular turns of wire wrapped in the shape of a cylinder

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

The magnetic feld inside a long straight solenoid carrying current is

The deflection of the galvanometer becomes zero the moment the motion of

The law states that if the forefinger indicates the direction of the magnetic field and thumb shows the direction of motion of conductor, then the middle finger will show the direction of induced current

You are holding the current-carrying wire in your right hand so that your thumb points in the direction of current, then the direction in which your fingers encircle the wire will give the direction of the magnetic feld lines around the wire.explain