First diagram below shows the scale of a micrometer screw gauge when the anvil and spindle are closed. Second diagram shows the scale of the micrometer screw gauge when it is measuring the thickness of a piece of glass.
Rajah pertama menunjukkan skala sebuah tolok micrometer semasa anvil dan bidal ditutup.
Radas kedua pula menunjukkan skala skru micrometer itu semasa mengukur ketebalan sekeping kaca.
What is the zero error of the micrometer screw micrometer gauge and the actual thickness of the glass?
A -0.03 mm 6.69 mm
B -0.03 mm 6.63 mm
C +0.03 mm 6.69 mm
D +0.03 mm 6.63 mm
Answer :
A
Bacaan sebenar= Bacaan alat-Ralar sifar
= 6.66 mm – (- 0.03 mm)
=6.66 mm + 0.03 mm
=6.69 mm