For which of the following substances, the resistance decreases with increase in temperature? (1) Pure silicon (2) Copper (3) Nichrome (4) Platinum

For which of the following substances, the resistance decreases with increase in temperature? (1) Pure silicon (2) Copper (3) Nichrome (4) Platinum
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(3) Nichrome Explanation: Nichrome has high resistance and it is called a resistor.
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For which of the following substances, the resistance decreases with increase in temperature? (1) Pure silicon (2) Copper (3) Nichrome (4) Platinum

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Pick out the wrong statement. (A) Alloys are harder than their component elements (B) Presence of silicon in steel decreases its electrical resistance (C) Karbate is an acid resistant material of construction (D) Nichrome, a steel alloyed with 10% Ni and 20% Cr can be used upto a temperature of 1100°C

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The element required for Solar energy conversion - (1) Beryllium (2) Silicon (3) Tantalum (4) Ultra pure carbon

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If temperature of a pure silicon specimen is increased, then

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Calculate the resistance of a 2 m long nichrome wire of radius 0.321 mm. Resistivity of nichrome is `15xx10^(-6) Omega` m. If a potential difference o

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A platinum resistance thermometer makes use of the variation of a conductor with temperature. If the resistance of this thermometer is `5 Omega " at "

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The material used in the fabrication of a transistor is – (1) Aluminium (2) Copper (3) Silicon (4) Silver

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Which of the following metals is used for the manufacture of heating elements provided in electric iron? (1) Nickel (2) Chromium (3) Nichrome (4) Tungsten

Description : Which of the following metals is used for the manufacture of heating elements provided in electric iron? (1) Nickel (2) Chromium (3) Nichrome (4) Tungsten

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The filament of electric bulb is made of (1) Iron (2) Nichrome (3) Tungsten (4) Graphite

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Description : When a detergent is added to pure water, its surface tension – (1) increases (2) decreases (3) remains constant (4) becomes infinite

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Last Answer : (B) Increases