Question

A length of 1m is measured using a
metal tape at 20°C. It is calibrated at a
temperature 40°C. The actual length is
(a = 2 x 10-4/°C)
(A) 2.004m
(B) 0.996
(C) 1.996m
(D) 0.004m

Answer 1

Answer:

op B

Explanation:

l2=l1(1+a∆t)

1=l(1+2*10^-4×20)

l=1-0.004

=0.996