Physics Practice: Physical Quantities and Measurement (Mock Test 4 - Expert)
1. An empty density bottle weighs $25 \text{ g}$. When filled with water, it weighs $50 \text{ g}$. What is the capacity of the bottle?
2. To measure the area of an irregular object accurately using a graph paper, the most important step is:
3. A student uses a thread to measure the length of a curved line. If the thread spans from the $2 \text{ cm}$ mark to the $15.5 \text{ cm}$ mark on a ruler, the length is:
4. Why does the level of mercury in a thermometer rise when it is placed in hot water?
5. Which experimental setup is used to find the volume of a piece of cork (which floats)?
6. A solar day is not constant throughout the year. Therefore, for standard measurement, we use:
7. The temperature of a liquid is $50^\circ\text{C}$. What is its value in the Kelvin scale? ($K = C + 273$)
8. When reading a measuring cylinder, a "convex meniscus" is formed by:
9. To measure the mass of a single paper clip using a beam balance, what is the best strategy?
10. If the density of an object is $2 \text{ g/cm}^3$ and its volume is $10 \text{ cm}^3$, its mass is:
11. A clinical thermometer must be "jerked" before use because:
12. A "Measuring Flask" (Volumetric flask) is specifically designed to:
13. While measuring the mass of a liquid using a beam balance, we must:
14. $1 \text{ decimetre}$ is equal to ________ centimetres.
15. Why is a standard unit necessary for measurement?
16. The area of a triangle with base '$b$' and height '$h$' is:
17. $1 \text{ m}^3$ is equivalent to ________ litres.
18. If a clock gains 5 minutes every hour, the error is in its ________ measurement.
19. Which instrument is used to measure the volume of a liquid precisely in a lab titration?
20. The SI unit of area is $m^2$. One $m^2$ is equal to ________ $cm^2$.