CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
Question

A rod is measured using a scale. The reading is 60 cm at 12C. If thermal coefficient of linear expansion of the rod is 3×105/C, the reading of the rod at 42C is:
(Assume the scale does not expand)

A
60.025 cm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
60.054 cm
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
60.065 cm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
59.985 cm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 60.054 cm
The increment in length
=αlΔT
=3×105×60×(4212)
=3×105×60×30
=54×103 cm
=0.054 cm
So, total length =(60+0.054) cm
=60.054 cm

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Thermal Expansion
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon