The electrical resistivities of five substances A, B, C, D and E are

1.	The electrical resistivities of five substances A, B, C, D and E are given below A) 5.20×10−8 Ωm B) 110×10−8 Ωm C) 2.60×10−8 Ωm D) 10.0×10−8 Ωm E) 1.70×10−8 Ωm (a) Which substance is the best conductor of electricity Why? (b) Which one is a better conductor : A or C ? Why (c) Which substance would you advise to be used for making heating elements of electric irons? Why? (d) Which two substances should be used for making electric wires ? Why?
Answer» The electrical resistivities of five substances A, B, C, D and E are given below A) $5.20 \times 10^{- 8} Ω m$ B) $110 \times 10^{- 8} Ω m$ C) $2.60 \times 10^{- 8} Ω m$ D) $10.0 \times 10^{- 8} Ω m$ E) $1.70 \times 10^{- 8} Ω m$ (a) Which substance is the best conductor of electricity Why? (b) Which one is a better conductor : A or C ? Why (c) Which substance would you advise to be used for making heating elements of electric irons? Why? (d) Which two substances should be used for making electric wires ? Why?

The electrical resistivities of five substances A, B, C, D and E are given below A) 5.20×10−8 Ωm B) 110×10−8 Ωm C) 2.60×10−8 Ωm D) 10.0×10−8 Ωm E) 1.70×10−8 Ωm (a) Which substance is the best conductor of electricity Why? (b) Which one is a better conductor : A or C ? Why (c) Which substance would you advise to be used for making heating elements of electric irons? Why? (d) Which two substances should be used for making electric wires ? Why?

Answer»

The electrical resistivities of five substances A, B, C, D and E are given below
A) $5.20 \times 10^{- 8} Ω m$
B) $110 \times 10^{- 8} Ω m$
C) $2.60 \times 10^{- 8} Ω m$
D) $10.0 \times 10^{- 8} Ω m$
E) $1.70 \times 10^{- 8} Ω m$

(a) Which substance is the best conductor of electricity Why?
(b) Which one is a better conductor : A or C ? Why
(c) Which substance would you advise to be used for making heating elements of electric irons? Why?
(d) Which two substances should be used for making electric wires ? Why?

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