Question

Which of the following is the best conductor of electricity?

• A. Tungsten
• B. Bismuth
• C. Silver
• D. Aluminum

Answer 1

The correct option is C

Silver

Explanation for correct option

(c) Silver

• When current flows easily, electrical conductivity will be higher.
• Current flow depends upon the valence free electrons and crystal structure.
• Electricity is easily conducted by metals and the best one is silver $\left(\mathrm{Ag}\right)$.
• This is because, there are electrons which can move freely in silver thank those which concludes in best conductor of electricity.
• Hence, option (c) silver is the best conductor of electricity.

Explanation for incorrect options

(a) Tungsten

• Tungsten $\left(\mathrm{W}\right)$ has both, high melting point and has high resistivity towards heat
• Therefore. tungsten in spite of being a metal, is poor conductor of electricity.
• Hence option (a) tungsten is incorrect.

(b) Bismuth

• Bismuth $\left(\mathrm{Bi}\right)$ has $5$ valence electrons and high resistance to current.
• So, it is poor conductor of electricity.
• Hence option (b) bismuth is incorrect.

(d) Aluminum

• Aluminum $\left(\mathrm{Al}\right)$ has $3$ valence electrons.
• So, in comparison to other metals, it is poor conductor of electricity.
• Hence option (d) aluminum is incorrect.

Hence, the correct option is (c) Silver.