Advertisements
Advertisements
प्रश्न
The size of bacteria is 1 µ. Find the number of bacteria present in 1 m length.
Advertisements
उत्तर
Size of a bacteria = 1 µ
Since 1 µ = 10-6 m
∴ Number of the particle = Total length/size of one bacteria
= 1 m/10-6 m
= 106
APPEARS IN
संबंधित प्रश्न
Draw a neat and labelled diagram of a vernier callipers. Name its main parts and state their functions.
State three uses of the vernier callipers.
State one use of a screw gauge.
What do you understand by the term zero error?
A micrometre screw gauge has a positive zero error of 7 divisions, such that its main scale is marked in 1/2 mm and the circular scale has 100 divisions. The spindle of the screw advances by 1 division complete rotation.
If this screw gauge reading is 9 divisions on the main scale and 67 divisions on the circular scale for the diameter of a thin wire, calculate
- Pitch
- L.C.
- Observed diameter
- Corrected diameter
A micrometre screw gauge has a negative zero error of 7 divisions. While measuring the diameter of a wire the reading on the main scale is 2 divisions and 79th circular scale division coincides with baseline.
If the number of divisions on the main scale is 10 to a centimetre and circular scale has 100 divisions, calculate
- pitch
- observed diameter
- least count
- corrected diameter.
State the formula for calculating the least count of screw.
What do you understand by the following term as applied to screw gauge?
Negative zero error
State whether the following statement is true or false by writing T/F against it.
A metre scale can measure a length of 6.346 cm.
What is the least count in the case of the following instrument?
Stopwatch
