Question

the device with maximum absolute uncertainty is:

•meter rod
•vernier callipers
•screwguage
•interferometer​

Answer 1

Meter Rod

Explanation:

1. The absolute uncertainty of the meter rod is ±0.1 cm.
2. The absolute uncertainty of the vernier calipers 0.001 cm.
3. The absolute uncertainty of the screw gauge is 0.001 cm.
4. The absolute uncertainty of the interferometer is 0.0001 cm.

Thus,

The device with maximum absolute uncertainty is: Meter Rod

• Absolute uncertainty is also known as absolute error.
• While adding or subtracting the measurements, the absolute uncertainty value of the instruments is also added.
• Types of uncertainty:

1. Random uncertainty
2. Relative uncertainty
3. Scale uncertainty
4. Systematic uncertainty
5. Absolute uncertainty