Silicates that are composed of infinite chains of tetrahedrons are called inosilicates; single chains have a unit composition of SiO 3 or Si 2 O 6, whereas double chains contain a silicon to oxygen ratio of 4:11. Phyllosilicates, or sheet silicates, are formed when three oxygen atoms are shared with adjoining tetrahedrons.
The force of gravity (mg) is the force of an object in free fall.
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<h3>Explanation</h3>
,
where
is the current;
is the drift speed;
is the cross-section area of the wire, 
is the number of charge carrier per unit volume, and
is the charge on each charge carrier.
Area of a circular cross-section:
,
where
is the radius of the wire.
and are the same for all four samples, for they are made out of the same material.
As a result, of each wire is directly proportional to 
where the value of 
is constant.
For each of the four wires:
.
How do the four wires rank by their current?
d > a > b > c.
