Which of the following has the maximum electrical resistivity?
Silver, Copper, Iron, Nichrome

Correct option is B

The correct option is (B) ​Nichrome

Information booster:

1. Silver: Has the lowest resistivity and is one of the best conductors of electricity. Its resistivity is about 1.59 × 10⁻⁸ Ω·m.
2. Copper: Slightly higher resistivity than silver, but still an excellent conductor. Its resistivity is around 1.68 × 10⁻⁸ Ω·m.
3. Iron: Has a higher resistivity compared to silver and copper. Its resistivity is about 9.71 × 10⁻⁸ Ω·m.
4. Nichrome: Has the highest resistivity among the options. Its resistivity is typically around 1.10 × 10⁻⁶ Ω·m, which is much higher than the other metals listed.

Summary:

• Silver: 1.59 × 10⁻⁸ Ω·m (lowest resistivity)
• Copper: 1.68 × 10⁻⁸ Ω·m
• Iron: 9.71 × 10⁻⁸ Ω·m
• Nichrome: 1.10 × 10⁻⁶ Ω·m (highest resistivity)

So, Nichrome has the highest resistivity.