Question : An electric iron has a heating element made of :
Option 1: Copper
Option 2: Tungsten
Option 3: Nichrome
Option 4: Zinc
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Correct Answer: Nichrome
Solution : The correct option is - Nichrome
An electric iron typically has a heating element made of a material called nichrome. It is an alloy composed of nickel, chromium, and sometimes small amounts of other elements. It is known for its high electrical resistance and ability to generate heat when an electric current passes through it.The reason nichrome is used for heating elements in devices like electric irons is because it can withstand high temperatures without deforming or oxidizing. This makes it ideal for applications where consistent and reliable heat generation is required.
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Question : Which among the following alloys is made up of copper and zinc?
Option 1: Monel Metal
Option 2: Magnalium
Option 3: Rolled Gold
Option 4: Dutch Metal
Question : Zinc and copper are in the ratio 5 : 3 in 400 gm of an alloy. How much copper (in grams) should be added to make the ratio 5 : 4?
Option 1: 50
Option 2: 66
Option 3: 72
Option 4: 200
Question : A fuse wire is made of
Option 1: An alloy of tin and copper
Option 2: An alloy of tin and lead
Option 3: An alloy of tin and aluminium
Option 4: An alloy of Nickel and Chromium
Question : A non-electronic conductor is
Option 1: Iron
Option 2: Gas Carbon
Option 3: Copper sulphate
Option 4: Mercury
Question : Yellow spots on citrus leaves is due to deficiency of:
Option 1: Zinc
Option 2: Magnesium
Option 3: Boron
Option 4: Iron
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