Science : Ch 13 – Magnetic Effects of Electric Current

Fleming’s Right-hand rule gives:

Inside the magnet, the field lines move from :

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:

Which of the following declaration is not correct about the magnetic field?

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 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:

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:

In electric motor, to make the coil rotating constantly in the identical direction, current is reversed in the coil after every half rotation by a device called:

Overloading is caused to:

The current which is created due to the relative motion of coil or magnet

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

A device that can convert electrical energy into mechanical energy is

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