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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 the resistors connected in series and write the two characteristics of it. (Draw figure).
Judge the equivalent resistance when the following are connected in parallel − (a) 1 Ω and 106Ω, (b) 1 Ω and 103Ω and 106Ω.
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 ______.
The substance having infinitely high electrical resistance is called:
(a) conductor
(b) resistor
(c) superconductor
(d) insulator
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
What is (a) highest, and (b)Ω lowest, resistance which can be obtained by combining four resistors having the following resistances?
4 Ω, 8 Ω, 12 Ω, 24 Ω
In series combination of resistances ______.
To increase the effective resistance in a circuit, the resistors are connected in _______________ .
What material is used for making wire to prepare heating coils? Give a reason.
Consider the following combinations of resistors:
The combinations having equivalent resistance 1 Q is/are ______.
