1 If the measured value is close to the true value, the measurement is said to be: A precise B accurate C uncertain D random
2 Which of the following is a random error? A Zero error B Parallax error C Faulty calibration D Variation in repeated readings
3 The uncertainty in a measurement taken with a metre rule having least count 1 mm is: A ± 1 mm B ± 0.5 mm C ± 0.1 mm D ± 2 mm
4 When reading the volume of a liquid in a measuring cylinder, the eye should be: A Above the meniscus B Below the meniscus C At the same level as the meniscus D Far away from the cylinder
5 While measuring the volume of an irregular solid by the displacement method, the initial reading of water in a measuring cylinder is 20 cm³ and the final reading is 35 cm³. The volume of the solid is: A 15 cm³ B 20 cm³ C 35 cm³ D 55 cm³
6 While measuring the volume of water in a measuring cylinder, the correct reading is taken at the: A Top of the meniscus B Bottom of the meniscus C Middle of the cylinder D Edge of the cylinder
7 Which instrument is most suitable for measuring the thickness of a thin wire? A Metre rule B Vernier callipers C Micrometer screw gauge D Measuring tape
8 Which instrument is used to measure the length of a small object with high precision? A Metre rule B Vernier callipers C Tape measure D Beam balance
9 Which instrument is most suitable for measuring the mass of a body? A Spring balance B Beam balance C Stopwatch D Measuring cylinder
11 What is meant by uncertainty in a measurement? A The exact value of measurement B The doubt in the measured value C The unit of measurement D The instrument used
15 The zero error of a measuring instrument is a type of: A Random error B Systematic error C Human error D Personal error
16 Which type of error is caused by a fault in the measuring instrument? A Random error B Systematic error C Human error D Personal error
17 To measure the mass of a body correctly with a beam balance, the body should be placed: A On the right pan B On the left pan C On the beam D On the base
19 Which type of error can be reduced by taking repeated readings and averaging them? A Systematic error B Random error C Zero error D Instrumental error
20 Which type of error can be reduced by taking repeated measurements? A Systematic error B Random error C Zero error D Personal error
21 Which of the following is a systematic error? A Zero error of an instrument B Random fluctuation in readings C Human error in reading D Parallax error
22 Which statement about precision is correct? A Precision means closeness to the true value. B Precision means closeness of repeated measurements to each other. C Precision is always equal to accuracy. D Precision is measured in metres.
24 What is the correct way to read the volume of a liquid in a measuring cylinder? A Read the top of the meniscus B Read the bottom of the meniscus at eye level C Read the middle of the meniscus from above D Read the liquid level from below
25 The least count of a Vernier callipers is 0.01 cm. What is the smallest length it can measure? A 0.1 cm B 0.01 cm C 0.001 cm D 1 cm