Apparatus The under-mentioned method is described based on the commerc
experiment. The kit usually contains the following pieces of appar
e available:
At least two trolleys and a trolley track
Pulley, cotton thread and hook
A set of similar, small mass pieces, usually in the form of
At least one large mass piece, with more or less the sam
Ticker-tape
Ticker-timer, usually DC
Battery holder (a DC power source may also be used if
Ticker
Trolley track
Trollov​

the answer is horst.

explanation:

in physical geography and geology, a horst is a raised fault block bounded by normal faults. a horst is a raised block of the earth's crust that has lifted, or has remained stationary, while the land on either side has subsided. the word horst in dutch and german means heap – cognate with english "hurst".

he . if i may ask what i your question exactly?

explanation:

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.