A metallic wire has a diameter of 4.12mm. When the current in the wire is 8.00A, the drift velocity is 5.40×10−5m/s. What is the density of free electrons in the metal?Express your answer numerically in m−3 to two significant figures.

Explanation:

We are given that

Diameter of wire=d=4.12 mm

Radius of wire=r

Current=I=8 A

Drift velocity=

We have to find the density of free electrons in the metal

We know that

Density of electron=

Using the formula

Density of free electrons=

By using Area of wire=

Density of free electrons=

lower, it's not as dense as chocolate syrup.

choco syrup is more like a solid than a liquid and even turns solid if it gets slightly cold,

orange juice however is a 95% liquid and has a very low viscosity

the answer would be c. motion and direction

i hope this : )