Magnetic effects of current of class X

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

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

• Straight lines

• Concentric circles

• Concentric ellipse

• Concentric parabolas

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

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.

Magnetic field inside a long solenoid carrying current is

• same at all points (uniform)

• different at poles and at the centre

• zero

• different at all points

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

• true

• false

Where is Earth's magnetic field the strongest?

• poles

• equator

• mountain tops

• ocean floor

The direction of the force on a current-carrying wire placed in a magnetic field depends on

• the direction of the current

• the direction of the field

• the direction of current as well as field

• neither the direction of current nor the direction of field

Magnetic field inside a long solenoid carrying current is

• same at all points (uniform)

• different at poles and at the centre

• zero

• different at all points