Measurement & Experimentation Quiz
Test your knowledge with these 10 interactive questions
1. Which of the following is the SI unit of length?
✅ Correct!
The meter (m) is the SI base unit of length. While centimeter, kilometer, and millimeter are metric units, they are not the base SI unit.
❌ Incorrect
The correct answer is Meter. The meter (m) is the SI base unit of length, while the others are derived metric units.
2. In the CGS system, the unit of force is:
✅ Correct!
The dyne is the unit of force in the CGS system. 1 dyne = 1 g·cm/s², while 1 newton = 10⁵ dynes.
❌ Incorrect
The correct answer is Dyne. The CGS system uses dyne for force (1 dyne = 1 g·cm/s²), while newton is the SI unit.
3. Which instrument has the smallest least count?
✅ Correct!
The micrometer screw gauge typically has a least count of 0.01 mm, which is smaller than vernier calipers (0.1 mm) and meter scales (1 mm).
❌ Incorrect
The correct answer is Micrometer screw gauge. It has the smallest least count (typically 0.01 mm) among these instruments.
4. What does a positive zero error in vernier calipers indicate?
✅ Correct!
A positive zero error occurs when the vernier scale's zero is to the right of the main scale zero when the jaws are closed, meaning you need to subtract this error from measurements.
❌ Incorrect
The correct answer is The zero mark of the vernier scale is to the right of the main scale zero. This means the instrument reads a positive value when it should read zero.
5. The time period of a simple pendulum depends on:
✅ Correct!
The time period T of a simple pendulum is given by T = 2Ï€√(l/g), where l is the length. For small angles, it's independent of mass and amplitude.
❌ Incorrect
The correct answer is Length of the pendulum. The time period T = 2Ï€√(l/g) depends only on length (l) and gravity (g) for small oscillations.
6. Which of the following are FPS units? (Select all that apply)
✅ Correct!
The FPS system uses Foot for length, Pound for mass, and Second for time. Meter is part of the metric system, not FPS.
❌ Incorrect
The correct answers are Foot, Pound, and Second. FPS stands for Foot-Pound-Second system. Meter is part of the metric system.
7. What is the relationship between the slope of the length (l) vs. T² graph for a simple pendulum and acceleration due to gravity (g)?
✅ Correct!
From the pendulum equation T = 2Ï€√(l/g), we get T² = (4Ï€²/g)l. Thus, the slope of l vs. T² graph is g/(4Ï€²).
❌ Incorrect
The correct answer is Slope = g/(4Ï€²). This comes from rearranging the pendulum equation T² = (4Ï€²/g)l.
8. The least count of a vernier calipers is calculated as:
✅ Correct!
The least count (LC) is the smallest measurement the instrument can make, calculated as LC = 1 MSD (Main Scale Division) - 1 VSD (Vernier Scale Division).
❌ Incorrect
The correct answer is 1 MSD - 1 VSD. The least count represents the difference between one main scale division and one vernier scale division.
9. Which of the following are SI base units? (Select all that apply)
✅ Correct!
Meter (length), kilogram (mass), and second (time) are SI base units. Newton is a derived unit (force).
❌ Incorrect
The correct answers are Meter, Kilogram, and Second. These are SI base units, while Newton is a derived unit (kg·m/s²).
10. What happens to the accuracy of measurement when the least count decreases?
✅ Correct!
A smaller least count means the instrument can measure smaller differences, resulting in higher precision and increased accuracy.
❌ Incorrect
The correct answer is Accuracy increases. Decreasing least count means the instrument can measure smaller differences, improving accuracy.
Quiz Results
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