Magnetic Effects of Electric Current

Magnetic field is a scalar quantity.

• True

• False

The magnetic field lines are__________.

• curves

• closed loops

• lines

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

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

Who was the first to observe the magnetic effect of electric current?

• Faraday

• Oersted

• Volta

• Ampere

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

The relative strength of the magnetic field is shown by the degree of closeness of the field lines.

• false

• true

• can't say

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

• true

• false

A wire is parallel to the lines of the force of the magnetic field and the current flows in the wire. Then

• The wire will experience a force along the direction of the magnetic field

• The wire will not experience any force

• The wire will experience the torque

• The wire will experience a perpendicular force