Science : Ch 13 – Magnetic Effects of Electric Current

A current-carrying conductor is clench in totally vertical direction. In order to produce a clockwise magnetic feld around the conductor, the current should passed in the conductor:

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

The strength of each of magnet reduces to half when it cut along its length into the equal parts magnetic field strength of a solenoid. Polarity of solenoid can be determined by:

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

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:

Overloading is caused to:

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

Commercial electric motors do not use

The magnetic feld inside a long straight solenoid carrying current is

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

A device that can convert electrical energy into mechanical energy is