Question : Which of the following has the highest value of resistivity?
Option 1: Silver
Option 2: Nichrome
Option 3: Chromium
Option 4: Iron
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Correct Answer: Nichrome
Solution : The correct option is Nichrome.
Resistivity is sometimes referred to as a material's specific resistance. It can be defined as the resistance of a specific conductor (material) of a given size (length and cross-sectional area). Because of its high resistance, which fights the passage of current and generates a lot of heat, Nichrome has the highest resistivity and demonstrates the heating influence of electricity. As a result, it is used as a heating coil in a wide range of household appliances, including room heaters, water heaters, ovens, heating rods, and so on.
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Question : Which of the metals has the maximum thermal conductivity?
Option 1: Iron
Option 2: Aluminium
Option 3: Silver
Option 4: Copper
Question : Which among the following metals is used for galvanisation?
Option 1: Zinc
Option 2: Copper
Option 3: Iron
Option 4: Silver
Question : Which of the following elements has variable valency?
Option 2: Sodium
Option 3: Sulphur
Option 4: Magnesium
Question : Which of the following metals was used to make weapons and tools in Harappan cities?
Option 2: Gold
Option 3: Copper
Question : The first metal used by man was
Option 1: Aluminium
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