Errors in Measurement

Q. In MKS system, the length is measured in.

1. metre
2. millimetre
3. centimetre

Q.

What are the advantages and disadvantages of using a rod of a given length as a unit of length?

Q. Which of the following can not be used to measure quantities accurately?

1. A metre scale.
2. Length of foot.
3. A stop watch.
4. A weighing machine.

Q. What is standardization? What is its importance?

Q.

Two students measure a particular length using the same instrument one after the other. They will always estimate an equal value even if they vary the position of their eyes.

1. True

2. False

Q.

Which of the following is not true of the standard weights certified by the Department of weights and measures?

1. Larger weights are made of iron

2. smaller weights are made of iron

3. The value is written on top

4. They are either hexagonal or circular in shape

Q.

An iron bar is not a good standard of measurement because:

1. it corrodes with time

2. its mass changes with time

3. its length changes with temperature

4. Both A and C

Q.

A task was assigned to Virat to measure a snake-like steel rod which looks something like this.

Which of the following objects/methods should he use to make this measurement?

1. A thread and a ruler

2. Meter scale

3. Pieces of marbles whose length is known

4. It is impossible to measure the length of a curved line

Q.

Describe in brief about CGS

Q. Ashwin is required to take the measurement of a wooden box. Which of the following should be the proper position of his eye for taking the reading?

1. 
2. 
3. 
4. 

Q. Ashwin is required to take the measurement of a wooden box. Which of the following should be the proper position of his eye for taking the reading?

1. 
2. 
3. 
4. 

Q. Which of the following practice creates least error while measurements?

1. Using precise instrument.
2. Using tampered pans to weight.
3. Using hand measurements.
4. Faulty instruments.

Q.

The length of your footstep can be used as a standard unit of length.

1. True
2. False

Q. Which out of these cannot be used to measure length precisely?

1. Metre scale
2. Handspan
3. Metric ruler
4. Measuring tape

Q.

Pavan is using a metre scale to measure the length of a rope. Which of the following represent the most appropriate observation?

1. 22 cm

2. 22.00 cm

3. 0.22 m

4. 22.0 cm

Q. arises when the reading of a scale is taken from a random angle.

1. Zero error
2. Angle error
3. Parallax error
4. Numerical error

Q.

Electric weighing machines with digital displays are used in laboratories and shops. Why?