Straw polls are considered to be a form of biased sampling. An example of a straw poll is an unofficial vote like who you would like to be the President without actually casting your ballot.
Answer:
Transverse wave
Explanation:
The wave is moving forwards from the hand to the point of attachment
1) Increasing the current flow
2) Increasing the number of coils
3) Passing an 'iron core' through the coil of the electromagnet
I think that it’s the first one
