The element of Electric stove is made of (1) Copper (2) Invar (3) Magnalium (4) Nicrome

The element of Electric stove is made of (1) Copper (2) Invar (3) Magnalium (4) Nicrome
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(4) Nicrome Explanation: Most heating elements use nichrome 80/20 (80% nickel, 20%chromium) wire, ribbon, or strip. Nichrome 80/20 is an ideal material, because it has relatively high resistance.
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__________ wire is never used for making the heating element. (A) Nichrome (B) Kanthal (C) Invar (D) None of these

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Ten coulombs of charge are placed on a solid copper sphere. Once the charge has come to rest, the ELECTRIC POTENTIAL inside the sphere is found to be: w) zero x) uniform inside the sphere and equal to the electric potential on the surface of the sphere y) smaller than the electric potential outside the sphere z) varying as one over r squared

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Last Answer : ANSWER: X -- UNIFORM INSIDE THE SPHERE AND EQUAL TO THE ELECTRIC POTENTIAL ON THE SURFACE OF THE SPHERE 

Ten coulombs of positive charge are placed on an irregularly-shaped, solid piece of copper. Once the charge has stopped moving, the electric field inside the copper is: w) zero x) changes as one over the radius squared y) becomes smaller as you approach the center z) becomes larger as you approach the center

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Last Answer : ANSWER: W -- ZERO