Science : Ch 13 – Magnetic Effects of Electric Current

Fleming’s Right-hand rule gives:

Commercial electric motors neglect :

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

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

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

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:

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

A D.C generator works on the theory of:

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

Commercial electric motors do not use

The phenomenon discovered by Faraday.

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