Question

3 The density of platinum is 21.4 g/cm and its resistivity is 1.0 x10 ohm-m . Assume the wire to be rectangular with dimension of 0.01 cm and 0.02 cm. If the mass of the wire is 51.36 mg, what is the resistance of the wire?​

Answer 1

Explanation:

Volume of Cu=10×10×10

−2

=1 cm

3

Density=

Volume

Mass

Mass=8.94 g

Cu

2+

+2e

−

⟶Cu

63.5 g⟶2 mol F

8.94 g⟶

63.5

2

×8.94=0.28