JEE PHYSICS UNIT 20
QUIZ NO 2
TOTAL QUESTIONS = 20
1. Which of the following is used to minimize errors due to parallax while taking measurements?
A. Using a mirror scale
B. Using a digital instrument
C. Increasing the observer’s distance
D. Using a magnifying glass
2. The precision of an instrument refers to
A. The ability to measure small differences accurately
B. The closeness of the measurement to the true value
C. The ability to provide consistent readings
D. The maximum range of measurement
3. In an experiment, which of the following helps to identify random errors?
A. Repeating the experiment and taking the average
B. Using a different measuring instrument
C. Changing the experimental conditions
D. Ignoring the zero error
4. Which of the following is a cause of systematic error?
A. Improper calibration of the instrument
B. Temperature fluctuations
C. Human error
D. Random fluctuations in measurement
5. The uncertainty in a measurement is determined by
A. The instrument's precision
B. The observer's skill
C. The length of the experiment
D. The type of measurement taken
6. When measuring the length of an object using a vernier caliper, the zero error can be corrected by
A. Subtracting the error from the final reading
B. Adding the error to the final reading
C. Adjusting the caliper's scale
D. Not using the instrument
7. The accuracy of a measurement is affected by
A. Systematic errors
B. Random errors
C. Zero errors
D. All of the above
8. The source of error due to human reaction time in measurement is known as
A. Parallax error
B. Zero error
C. Instrumental error
D. Personal error
9. What is the primary cause of a zero error in an instrument?
A. Instrument not being calibrated properly
B. Temperature variation during measurement
C. Using a different scale
D. Change in the environment
10. Which of the following instruments is best suited for measuring the diameter of a thin wire?
A. Micrometer screw gauge
B. Vernier caliper
C. Graduated cylinder
D. Thermometer
11. The standard deviation in a set of measurements is used to measure
A. The accuracy of the measurement
B. The average of all measurements
C. The precision of the measurements
D. The resolution of the instrument
12. In an experiment to measure the resistivity of a material, which instrument is primarily used to measure voltage?
A. Voltmeter
B. Ammeter
C. Galvanometer
D. Wattmeter
13. In an experimental setup, a large error due to friction can be minimized by
A. Lubricating the moving parts
B. Increasing the force applied
C. Using an uncalibrated instrument
D. Ignoring the error
14. When performing an experiment, the most common way to deal with random errors is by
A. Taking multiple readings and averaging them
B. Using the best reading out of all
C. Eliminating the smallest error
D. Changing the experimental setup
15. Which of the following is true about systematic errors?
A. They can be reduced or eliminated by calibration
B. They vary randomly from measurement to measurement
C. They do not affect the accuracy of the results
D. They do not affect the final results
16. In a measurement of time, a systematic error would occur if
A. The stop watch is not calibrated properly
B. The time interval is too long
C. The time is recorded by an inexperienced person
D. The environment is not controlled
17. Which of the following methods can reduce human error during a measurement?
A. Automating the measurement process
B. Relying on a single observer
C. Changing the measurement tool
D. Ignoring small discrepancies
18. In an experiment involving heat transfer, the precision of the results can be improved by
A. Using a thermometer with finer divisions
B. Using a larger container
C. Increasing the temperature gradient
D. Decreasing the measurement time
19. The major cause of error in a measurement due to improper reading of the scale is
A. Parallax error
B. Zero error
C. Random error
D. Human error
20. Which of the following describes the concept of uncertainty in measurement?
A. The difference between the measured value and the true value
B. The range of values an instrument can measure
C. The smallest division on the scale
D. The maximum error in any measurement
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