मराठी

List the Factors on Which the Resistance of a Conductor in the Shape of a Wire Depends. - Science

Advertisements
Advertisements

प्रश्न

List the factors on which the resistance of a conductor in the shape of a wire depends.

उत्तर

The resistance of a conductor in the shape of a wire depends​ on the following factors:

  • Length of the conductor
  • The cross-sectional area of the conductor
  • The temperature of the conductor 
  • Nature of the material used
shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
2017-2018 (March) Delhi Set 1

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

What is the general name of the substances having infinitely high electrical resistance?


Classify the following into good conductors, resistors and insulators:

Rubber, Mercury, Nichrome, Polythene, Aluminium, Wood, Manganin, Bakelite, Iron, Paper, Thermocol, Metal coin


What will be the resistance of a metal wire of length 2 metres and area of cross-section 1.55 × 10−6 m2 if the resistivity of the metal be 2.8 × 10−8 Ω m?


How does the resistance of a conductor depend on: 

 area of cross-section of the conductor?


The figure blow shows a variable resistor in a dimmer switch.  

How would you turn the switch to make the lights: (a) brighter, and  (b) dimmer? Explain your answer. 


Write the relation between resistance and electrical resistivity of the material of a conductor in the shape of a cylinder of length `'l'`  and area of cross-section `'A'` . Hence derive the S.I. unit of electrical resistivity.


Resistance of a metal wire of length 5 m is 100 Ω . If the area of cross - section of the wire is `3 × 10^-7  "m"^2` , Calculate the resistivity of the metal . 


A cylindrical conductor of length l and uniform area of cross-section A has resistance R. Another conductor of length 2l and resistance R of the same material has an area of cross-section:


Assertion: Conductors allow the current to flow through themselves.

Reason: They have free charge carriers.


How will the resistance of a wire be affected if its

  1. length is doubled, and
  2. radius is also doubled ?

Give justification for your answer.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×