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प्रश्न
State the order of resistivity of (i) a metal, (ii) a semiconductor and (iii) an insulator.
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उत्तर
Metal < Semiconductor < Insulator
संबंधित प्रश्न
Find the expression for resistors connected in series.
A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R’, then the ratio `"R"/"R'"` is ______.
Give the law of combination of resistances in series.
If two resistors of 25 Ω and 15 Ω are joined together in series and then placed in parallel with a 40 Ω resistor, the effective resistance of the combination is :
(a) 0.1 Ω
(b) 10 Ω
(c) 20 Ω
(d)40 Ω
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(b) the safe limit of the current in it, while in use?
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A metal wire of resistance 6 Ω is stretched so that its length is increased to twice its original length. Calculate its new resistance.
