The following table provides the resistivity of three samples:
Sample $A$ $B$ $C$ Resistivity $1.6 \times 10^{-8} \Omega \cdot m$ $5.2 \times 10^{-8} \Omega \cdot m$ $100 \times 10^{-6} \Omega \cdot m$
Which of them is suitable for heating elements of electrical appliances and why?
| Sample | $A$ | $B$ | $C$ |
| Resistivity | $1.6 \times 10^{-8} \Omega \cdot m$ | $5.2 \times 10^{-8} \Omega \cdot m$ | $100 \times 10^{-6} \Omega \cdot m$ |
Which of them is suitable for heating elements of electrical appliances and why?
(C) Sample $C$ is suitable for heating elements of electrical appliances.
Reason: Heating elements require materials with high resistivity so that they can produce a significant amount of heat when an electric current passes through them, according to Joule's Law of heating $(H = I^2Rt)$. Among the given samples, Sample $C$ has the highest resistivity $(100 \times 10^{-6} \Omega \cdot m)$, making it the most efficient choice for generating heat.
Reason: Heating elements require materials with high resistivity so that they can produce a significant amount of heat when an electric current passes through them, according to Joule's Law of heating $(H = I^2Rt)$. Among the given samples, Sample $C$ has the highest resistivity $(100 \times 10^{-6} \Omega \cdot m)$, making it the most efficient choice for generating heat.
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