Question

If you make an electromagnet using a battery circuit and a steel nail, how can you increase its magnetic strength?

A.
replace the nail with a copper rod

B.
wrap more coils of wire around the nail

C.
use a longer nail

D.
remove the plastic insulation from the wire coil

Answer 1

I think its B @Dkace

Answer 2

Correct, the more coils around it the stronger it will be.

Answer 3

Thx c: one more?

Answer 4

Sure.

Answer 5

The image shows that an electromagnet made with a 1.5-volt battery (on the left). How would the strength of an electromagnet be affected if you replaced its 1.5-volt battery with a 9-volt battery (shown on the right) while using the same nail and coil?



A.
The magnetic field strength would increase.

B.
The magnetic field strength would decrease.

C.
The change would not affect the magnetic field.

D.
The magnetic field would change direction more frequently.
http://static.k12.com/calms_media/media/1108500_1109000/1108574/1/047dbb15095828e44b31698c0d8107660fb54cfc/MS2_PHY_08_07_assess_PIC_batter_volts.jpg

Answer 6

I think it would be A

Answer 7

If more voltage is added, it would do the same thing as more coils increase the strength so the magnetic field strength would increase.

Answer 8

Thx!!! c: