|
Rainbow mind map
for Vernier caliper: |
Definition |
Precision measuring instrument |
|
Measures internal/external dimensions |
|
High accuracy and precision |
Construction |
Main scale |
Vernier scale |
Jaw |
Depth bar |
Locking screw |
Least count |
Smallest measurement possible |
Calculated by: 1 main scale division / Number of vernier
scale divisions Usually 0.1 mm |
Working Principle* |
Main scale measures coarse dimensions |
|
Vernier scale measures fine dimensions |
|
Alignment of scales indicates measurement |
Method of Use |
1. Zero Error- Ensure zero alignment |
2. Measure: Place object between jaws |
3. Read : Main scale and vernier scale readings |
4. Record: Measurement in mm or inches |
|
5. Lock: Secure measurement with locking screw. |
Precautions |
Handle with care to avoid damage |
|
Use correct technique to avoid parallax error |
|
Calibrate regularly to ensure accuracy |
|
Clean and store properly |
Applications |
Mechanical engineering |
Quality control |
Scientific research |
Precision measurement |
|
2. Click for detail information Definition:
A screw gauge is a
precision measuring instrument used to measure small distances or thicknesses. Construction: It consists of a screw, barrel, anvil, jaw,
thimble, and sleeve. Least Count: The smallest
measurement possible, calculated by dividing the pitch by the number of threads
per rotation (usually 0.01 mm). Working
Principle: The rotating screw moves the jaw along the
barrel, and the measurement is based on the pitch and number of rotations. Method
of Use: Calibrate the screw gauge Place the object between the anvil and
jaw -Rotate the thimble until the object is
securely held -Read the measurement on the barrel and
thimble -Record the measurement in mm or inches Precautions: Handle with care to avoid damage Use correct technique to avoid parallax
error Calibrate regularly to ensure accuracy Applications: Screw gauges are used in mechanical
engineering, quality control, and scientific research to measure small
distances and thicknesses. 🌈 Mind map
Simple Pendulum: Definition Device consisting
of a weight suspended from a pivot Used to demonstrate
oscillatory motion Construction Bob (weight) String or rod Pivot point Clamp or stand Time Period Time taken for one
complete oscillation Calculated by: T =
2Ï€ √(L/g) L-length
and g-acceleration due to gravity Working
Principle Pendulum swings due
to gravity Energy conversion
between kinetic and potential Method
of Use 1. Setup- Suspend
bob from pivot 2. Measure-Length
of pendulum 3. Count-Number of
oscillations 4. Time-Measure time
period 5. Calculate- g
(acceleration due to gravity) Factors
affecting time period 1.length of the
pendulum ( directly proportional to the square root of its length ) 2. Acceleration due
to gravity ( inversely proportional to the square root of acceleration due to gravity
) Real-World
Analogies Clock pendulums Swinging bridges Child swings |
ICSE class 9 Physics, Solutions Chapter 1- Measurements and Experiments - 1B
ICSE class 9 Physics, Solutions Chapter 1- Measurements and Experiments- 1C
