wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
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?

A
they took bars of same length but different cross section area
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
they took bars of same cross section area but different length.
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
both length and cross section area of bars were different
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
All of the above
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is D 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
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Resistivity and Conductivity
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon