Science : Ch 13 – Magnetic Effects of Electric Current

Commercial electric motors neglect :

An electron moves with a speed v along positive direction of the x-axis. If a magnetic feld B acts along the positive y-direction, then the force on the electron will act along:

Magnetic effect of current was identified by:

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:

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

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

A D.C generator works on the theory of:

The name of the effect being produced by the moving magnet

Commercial electric motors do not use

The phenomenon discovered by Faraday.

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