हिंदी

How Does the Resistance of a Pure Metal Change If Its Temperature Decreases? - Science

Advertisements
Advertisements

प्रश्न

How does the resistance of a pure metal change if its temperature decreases?

Advertisements

उत्तर

The resistance of all pure metals increases on raising the temperature and decreases on lowering the temperature. Therefore, the resistance of a pure metal will decrease on decreasing the temperature.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 1: Electricity - Exercise 4

APPEARS IN

लखमीर सिंग Physics (Science) [English] Class 10
अध्याय 1 Electricity
Exercise 4 | Q 12.1

संबंधित प्रश्न

Find the expression for the resistors connected in series and write the two characteristics of it. (Draw figure).


The V-I graph for a series combination and for a parallel combination of two resistors is shown in the figure below. Which of the two A or B. represents the parallel combination? Give reasons for your answer.


Calculate the resistance of an aluminium cable of length 10 km and diameter 2.0 mm if the resistivity of aluminium is 27 × 10−8 Ωm. 


Calculate the combined resistance in each case: 


State the order of resistivity of (i) a metal, (ii) a semiconductor and (iii) an insulator. 


In series combination of resistances ______.


What do you mean by an equivalent resistance?

Name the following substances:
(i) Showing low resistivity,
(ii) Showing very high resistivity,
(iii) Showing moderate resistivity.


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


Bends in a rubber pipe reduce the flow of water through it. How would the bands in a wire affect its electric resistance?


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


Write an expression for the resistance of a conducting wire in terms of its length and area of cross-section.


Define the term resistivity and state its S.I. unit. Which will have higher resistivity a conductor or an insulator.


You are provided with three resistors of resistance 1.0 Ω, 2.0 Ω and 3.0 Ω How would you connect them to obtain the total effective resistance 1.5 Ω? Draw diagram of the arrangement and check it by calculations.


Six equal resistors of 1 ohm each are connected to form the sides of a hexagon ABCDEF. Calculate the resistance offered by the combination if the current enters at A and leaves it at D.


Two resistors of 4Ω and 6Ω are connected in parallel to a cell to draw 0.5 A current from the cell. Calculate the current in each resistor.


What should be the length of a nickel wire of area of cross-section 3 mm2 used for making a rheostat of 750 ohm? (ρ of nickle = 0.069 Ohm mm2/m)


If R1 and R2 be the resistance of the filament of 40 W and 60 W respectively operating 220 V, then:


When a 4 Ω resistor is connected across the terminals of a 2 V battery, the number of coulombs passing through the resistor per second is:


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×