Science : Ch 13 – Magnetic Effects of Electric Current

Inside the magnet, the field lines move from :

For a current in a long straight solenoid N and S-poles are created at the two ends. Among the subsequent declaration , the incorrect declaration is:

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

Magnetic effect of current was identified by:

By which instrument, the presence of magnetic field be resolved?

The nature of magnetic field line passing through the centre of current carrying circular loop is:

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

A magnet is moved towards a coil (i) quickly (ii) slowly. The induced potential difference:

A D.C generator works on the theory of:

when an iron core is inserted into a current carrying solenoid

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

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

Which of the following is not attracted by a magnet:

Two magnetic feld lines never intersect because the resultant force on a north pole at any point can only be in

When a strong bar magnet is pushed into a coil of insulated copper wire connected to a galvanometer, we will observe a deflection in the galvanometer in