A current carrying conductor is held in exactly vertical direction. In order to produce a clockwise magnetic field around the conductor, the current should be passed in the conductor:

• From top to bottom

• From left to right

• From bottom to top

• From right to left

A positive charge is moving towards a person. The direction of magnetic field lines will be in

• Clockwise direction

• Anticlockwise direction

• Vertically upward direction

• Vertically downward direction

The shape of the magnetic field lines produced by a current carrying conductor are:

• Straight lines

• Concentric circles

• Concentric ellipse

• Concentric parabolas

Which of the following diagrams correctly shows the magnetic field produced by a current- carrying wire?

• A

• B

• C

• D

The pattern of the magnetic field produced by the straight current carrying conducting wire is

• in the direction opposite to the current

• in the direction parallel to the wire

• circular around the wire

• in the same direction of current

The nature of magnetic field line passing through the centre of current carrying circular loop is :

• circular

• ellipse

• parabolic

• straight line

Who has stated the Right hand Thumb Rule?

• Orsted

• Fleming

• Einstein

• Maxwell

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

• Magnetic Needle

• Ammeter

• Galvanometer

• Voltmeter

The strength of magnetic field around a current carrying conductor is

• inversely proportional to the current but directly proportional to the square of the distance from wire.

• directly proportional to the current and inversely proportional to the distance from wire.

• directly proportional to the distance and inversely proportional to the current

• directly proportional to the current but inversely proportional the square of the distance from wire.

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

• North

• South

• West

• East