q32. Which device can be used to measure the thickness of a single sheet of paper?A a metre ruleB a micrometerC a plastic rulerD a measuring tape

Break Down the Problem

1. Identify the devices listed that can accurately measure small dimensions.
2. Consider the precision required to measure the thickness of a single sheet of paper.

Relevant Concepts

• Metre Rule: Typically used for larger measurements and lacks precision for small dimensions.
• Micrometer: Designed to measure small distances with high accuracy, typically down to 0.01 mm.
• Plastic Ruler: Similar to the metre rule, generally less precise for very thin measurements.
• Measuring Tape: Best suited for longer distances, not precise for thin items.

Analysis and Detail

The thickness of a standard sheet of paper is roughly 0.1 mm, which requires a measuring tool capable of providing a precise measurement.

1. Metre Rule: Not suitable due to lack of fine measurement.
2. Micrometer: Ideal choice, specifically designed for measuring small dimensions with high accuracy.
3. Plastic Ruler: Not designed for small, precise measurements.
4. Measuring Tape: Again, not suitable for measuring thin objects.

Verify and Summarize

Among the options:

• A and C do not provide the necessary precision.
• D is meant for larger distances.

B (Micrometer) is explicitly built for such precise measurements.

Final Answer

B - a micrometer is the device that can be used to measure the thickness of a single sheet of paper.