Magnetism, Heat and Light

The Magnetic lines of force:

• Intersect at the neutral point

• Intersect near the north and south pole

• Cannot intersect at all

• Depends upon the position of the magnet

In a electric bell when iron strip displaces from its original position, then

• The iron strip becomes magnetized.
• The bell stops ringing.
• The bell starts ringing louder.
• The bell continues to ring indefinitely.

In a electric bell when iron strip displaces from its original position, then

• Current will stop flowing

• Electromagnet looses its magnetism

• Current will continue following

• Non of the above

Magnetic field is a ________quantity

• vector
• static
• constant
• scalar

The SI Unit of magnetic field intensity is

• T/m
• N/A
• V/m
• A/m

The SI Unit of magnetic field intensity is

• Tesla

• Weber

• Oersted

• none of these

The magnetic lines of force determines

• The color of a magnetic field.
• The temperature of a magnetic material.
• The speed of magnetic waves.
• The direction and strength of a magnetic field.

CGS unit of magnetic field intensity is

• Weber

• Gauss

• Henry

• Tesla

The chemical formula of magnetite (natural magnet) is

The south pole of the earth's magnetic field points to the ___________

• geographic North Pole
• geographic South Pole
• equator
• magnetic South Pole