GK
PHYSICS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
A Use a micrometer screw gauge
|
|
|
B Use a ruler and look at the scale perpendicularly.
|
|
|
C Use a top pan balance.
|
|
|
D Use the displacement method with water in a measuring cylinder.
|
Detailed explanation-1: -What is the most accurate and precise method to measure the thickness of a coin? A Use a micrometer screw gauge.
Detailed explanation-2: -The appropriate unit for measuring the thickness of a coin is millimetre which is a submultiple of metre. It can be measured with metre, centimetre and kilometre as well, but millimetre would be more convenient and accurate than other measurements.
Detailed explanation-3: -A metre ruler can be used to measure the thickness of a coin even if it is less than 1 mm. For this, the height of a stack of few number of coins (say 10) is measured by using the metre rule and then the thickness of a coin is obtained by dividing the height with the number of coins in the stack.
Detailed explanation-4: -For the thickness of the coin, we decided that the micrometer screw gauge was the best measuring instrument to use.
Detailed explanation-5: -Head scale coincidence (HSC) = 68. Least count (LC) = 0.01 mm. Assuming no zero error, we get. Corrected Head scale coincidence (CHSC) = 68. Thickness of the coin = PSR + (CHSC × LC) More items