Science : Ch 13 – Magnetic Effects of Electric Current

Fleming’s Right-hand rule gives:

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:

Commercial electric motors neglect :

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

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

When current is parallel to magnetic field, then force experience by the current carrying conductor placed in uniform magnetic field is

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:

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

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

The name of the effect being produced by the moving magnet

A coil of many circular turns of wire wrapped in the shape of a cylinder

Which of the following is not attracted by a magnet:

The magnetic feld inside a long straight solenoid carrying current is

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

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