CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

Rajat, Sarath and Komal decided to measure resistance of aluminium and took bars of aluminium separately and measured its resistance in same room but got different values of resistance, of same material aluminium. What can be the probable reasons for these variations in resistance for same material?
  1.  All of the above
  2. both length and cross section area of bars were different
  3. they took bars of same cross section area but different length.
  4. they took bars of same length but different cross section area


Solution

The correct option is A  All of the above
The equation representing the dependency of the resistance (R) of a conductor (e.g., a wire) upon the variables that affect it is
R=pLA
where L represents the length of the wire (in meters), A represents the cross-sectional area of the wire (in meters2), and (p) represents the resistivity of the material (in ohm•meter
Basically if the material is same means  resistivity (p) is same for both rods, other factors which influence the  values of resistance  is length and cross sectional area.
Therefore all the above.
 

flag
 Suggest corrections
thumbs-up
 
0 Upvotes


Similar questions
View More



footer-image