Units and Measurements — Important Questions
Telangana Open School (TOSS) · Class 12 · Physics
47 important questions from Units and Measurements for Telangana Open School (TOSS) Class 12 Physics, with answers. Written for the board exams 2027.
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Important Questions from Units and Measurements
Which of the following prefixes represents 10⁻⁹?
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Nano
Nano represents 10⁻⁹. For example, 1 nanometer = 10⁻⁹ meters.
The dimension of length is represented by:
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L
In dimensional analysis, length is denoted by 'L', mass by 'M', and time by 'T'.
Which of the following is a derived unit?
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Newton
Newton is a derived unit of force, expressed as kg·m/s², while second, metre, and kilogram are base units.
The standard kilogram is made of:
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Platinum-Iridium alloy
The international prototype of the kilogram is made of a platinum-iridium alloy due to its stability and resistance to corrosion.
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