Question

Which of the following is not a systematic error ?
Instrumental error
Imperfection in experimental technique
Personal error
All of these​

Answer 1

Answer:

Types of Errors- Systematic Errors

Errors which can either be positive or negative are called Systematic errors. They are of following types:

Instrument errors: These arise from imperfect design or calibration error in the instrument. Worn off scale, zero error in a weighing scale are some examples of instrument errors.

Imperfections in experimental techniques: If the technique is not accurate (for example measuring temperature of human body by placing thermometer under armpit resulting in lower temperature than actual) and due to the external conditions like temperature, wind, humidity, these kinds of errors occur

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Answer 2

Personal error is not a systematic error.

Explanation:

(c) personal error

Systematic error skews your measurement away from the true value in a specific direction. Personal errors introduced due to fault of an observer taking readings, referred to human error. These errors are the result of ignorance, carelessness, prejudices, or physical limitations on the experimenter.