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The Substance Having Infinitely High Electrical Resistance is Called: (A) Conductor (B) Resistor (C) Superconductor (D) Insulator - Science

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प्रश्न

The substance having infinitely high electrical resistance is called:

(a) conductor
(b) resistor
(c) superconductor
(d) insulator

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उत्तर

(d) insulator
A substance having infinitely high electrical resistance is called an insulator.

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अध्याय 1: Electricity - Exercise 3

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लखमीर सिंग Physics (Science) [English] Class 10
अध्याय 1 Electricity
Exercise 3 | Q 27

संबंधित प्रश्न

In series combination which remains constant?
(a) Voltage
(b) Current
(c) Both current and voltage
(d) Both are variables


If the equivalent resistance is to be increased, then the number of resistances should be connected in

  1. Series
  2. Parallel
  3. Mixed arrangement
  4. None of the above

Find the expression for resistors connected in series.


Name the material which is the best conductor of electricity.


V = IRTwo resistances X and Y are connected turn by turn : (i) in parallel, and (ii) series. In which case the resultant resistance will be less than either of the individual resistances?R = R1+ R2+ R3


Calculate the combined resistance in each case: 


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


Name a substance of which the resistance remains almost unchanged by the increase in  temperature. 


In series combination of resistances ______.


A graph is plotted taking p.d. along y-axis and electric current along x-axis. Name the physical quantity that represents the slope of this graph (Fig.).


Does a voltmeter have a low or high resistance?

What is the equivalent resistance between A and B in the given circuit (Fig?)


To increase the effective resistance in a circuit, the resistors are connected in _______________ .


State the effect of rise in temperature on the resistance of semi-conductors.


The voltage applied to a given rheostat is made four times its initial value. By what factor will be resistance of the rheostat change?


State expression for Cells connected in parallel.


Write an expression for calculating electrical power in terms of current and resistance.


State and explain the laws of resistance.


Four resistances of 2.0Ω each are joined end to end, to form a square ABCD. Calculate the equivalent resistance of the combination between any two adjacent comers.


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