Zero Error and Correct Way to Measure Length
- Parallax error
- Zero error
- Numerical error
- Angular error
- 1 cm
- 30 cm
- 29 cm
- 59 cm
- (a) and (b) above.
1 metre can be defined as distance travelled by light in 1299792458 seconds in vacuum.
A piece of ribbon folded five times is placed along a 30 cm long measuring scale as shown in Fig.
The length of the ribbon is between:
(a) 1.15 - 1.25 m
(b) 1.25 - 1.35 m
(c) 1.5 - 1.6 m
(d) 1.6 - 1.70 m
Four children measure the length of a table which was about 2 m. Each of them used different ways to measure it.
(i) Sam measured it with a half metre long thread.
(ii) Gurmeet measured it with a 15 cm scale from her geometry box.
(iii) Reena measured it using her hand span.
(iv) Salim measured it using a 5 m long measuring tape.
Which one of them would get the most accurate length? Give reason for your answer.
You are provided three scales A, B and C as shown in Fig. to measure a length of 10 cm.
For the correct measurement of the length, you will use the scale,
(a) A only
(b) B only
(c) C only
(d) Any of three scales
Three students measured the length of a corridor and reported their measurements. The values of their measurements were different. What could be the reason for the difference in their measurements?
Which of the following figure shows the correct placement of a block along a scale for measuring its length?
Four pieces of wooden sticks A, B, C and D are placed along the length of 30 cm long scale as shown in Fig. Which one of them is 3.4 cm in length?