📌 Topics for MCQs – Chapter 1 (Physical Quantities and Measurements)
MCQs in board exams are mostly based on these topics:
1. Physical and Non-Physical Quantities
A physical quantity is one that: (a) Can be measured (b) Cannot be measured (c) Has no unit (d) Is subjective
Which is a physical quantity? (a) Length (b) Beauty (c) Love (d) Happiness
2. Base and Derived Quantities
Which is a base quantity? (a) Length (b) Speed (c) Force (d) Pressure
Which is a derived quantity? (a) Speed (b) Mass (c) Time (d) Temperature
The SI unit of length is: (a) Meter (b) Gram (c) Second (d) Kelvin
The SI unit of mass is: (a) Kilogram (b) Meter (c) Second (d) Ampere
3. SI Units and Prefixes
Kilo means: (a) 10³ (b) 10⁶ (c) 10⁻³ (d) 10⁻⁶
Milli means: (a) 10⁻³ (b) 10³ (c) 10⁶ (d) 10⁻⁶
Micro means: (a) 10⁻⁶ (b) 10³ (c) 10⁻³ (d) 10⁶
Giga means: (a) 10⁹ (b) 10⁶ (c) 10³ (d) 10⁻⁹
4. Scientific Notation
1500 in scientific notation is: (a) 1.5 × 10³ (b) 15 × 10² (c) 150 × 10¹ (d) 1.5 × 10⁴
0.00025 in scientific notation is: (a) 2.5 × 10⁻⁴ (b) 2.5 × 10⁴ (c) 25 × 10⁻⁵ (d) 0.25 × 10⁻³
5. Measuring Instruments
Vernier callipers measure up to: (a) 0.01 cm (b) 0.001 cm (c) 0.1 cm (d) 1 cm
Micrometer screw gauge measures up to: (a) 0.001 cm (b) 0.01 cm (c) 0.1 cm (d) 1 cm
The least count of a ruler is: (a) 1 mm (b) 0.1 mm (c) 0.01 mm (d) 0.001 mm
6. Zero Error
When reading is positive with no object, it is: (a) Positive zero error (b) Negative zero error (c) No error (d) Random error
When reading is negative with no object, it is: (a) Negative zero error (b) Positive zero error (c) No error (d) Systematic error
7. Significant Figures
2.5 has how many significant figures? (a) 2 (b) 3 (c) 4 (d) 1
0.025 has how many significant figures? (a) 2 (b) 3 (c) 4 (d) 1
2500 has how many significant figures? (a) 2 (b) 3 (c) 4 (d) 1
8. Precision and Accuracy
Closeness of measurements to each other is: (a) Precision (b) Accuracy (c) Both (d) None
Closeness to the true value is: (a) Accuracy (b) Precision (c) Both (d) None
9. Errors
Parallax error is an example of: (a) Human error (b) Systematic error (c) Random error (d) None
Zero error is an example of: (a) Systematic error (b) Human error (c) Random error (d) None
10. Volume Measurement
Measuring cylinder is used to measure: (a) Volume of liquid (b) Mass (c) Length (d) Time
Displacement can method is used for: (a) Volume of irregular objects (b) Mass (c) Length (d) Time