Electricity

Which statement is true?

• I. All electromagnets are permanent magnets.

• II. Increasing the number of coils in an electromagnet decreases it strength.

• III. Increasing the batteries increases the strength of an electromagnet.

• Both I and II

Which can increase the strength of an electromagnet?

• increasing the number of coils around the nail

• increasing the number of batteries

• making the core bigger

• all of the above

Which of the electromagnets would have the greatest magnetic field?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-3

Which of the following is NOT part of an electromagnet?

• wire

• core

• battery

• needles

It is a kind of magnet that works only when there is a flow of electricity.

• Electromagnet

• Bar Magnet

• Horse Shoe Magnet

• Magnetite

Tags

NGSS.MS-PS2-3

Which appliance does NOT use electromagnet?

• telephone

• television

• radio

• broom

Tags

NGSS.MS-PS2-3

Which is NOT made of electromagnet?

• cooking pan

• transformer

• generator

• motor

Which of these forces can be used in a motor?

• magnetism

• wind

• friction

• gravity

Tags

NGSS.MS-PS2-3

Electromagnets are ___________________.

• permanent

• instant

• temporary

• stable

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which makes an electromagnet work?

• needle

• electricity

• pin

• thumbtacks