Magnetic effects of electric Current

Magnetic field is a scalar quantity.

• True

• False

The magnetic field lines are__________.

• curves

• closed loops

• lines

No two field-lines are found to cross each other.

• False

• True

Magnetic field produced around a straight conductor due to current in it is given by

• Fleming's right hand rule

• Right hand thumb rule

• Clock rule

• Fleming's left hand rule

Direction of magnetic field produced by a current carrying loop can be found by using

• Fleming's Right hand rule

• Clock Rule

• Fleming's Left hand rule

• Maxwell's corkscrew rule

Which of the following correctly describes the magnetic field near a long straight wire?

• The field consists of straight lines perpendicular to the wire.

• The field consists of straight lines parallel to the wire.

• The field consists of radial lines originating from the wire.

• The field consists of concentric circles centred on the wire.

A freely suspended bar magnet always rest in N-S direction

• True

• False

Refer the diagram. A wire carries a current, creating a magnetic field around itself as shown. The current in the wire is:

• Directed to the right

• Directed to the left

• Equal to the magnetic field

• n the same direction as the magnetic field

Refer the diagram. The right face of the loop acts as North pole and left side of loop acts as south pole

• False

• True

Refer the diagram. At the centre of which of the following four circular rings the magnetic field is the strongest for equal magnitude of current?

• Loop 1

• Loop 2

• Loop 3

• Loop 4