16 Questions
What are fundamental quantities?
Fundamental quantities are physical quantities that are independent of other physical quantities.
Give an example of a derived quantity.
Force, pressure, acceleration, volume, etc. are examples of derived quantities.
What are the three basic units in the C.G.S. system?
The three basic units in the C.G.S. system are centimeter, gram, and second.
What does SI stand for and what does it comprise?
SI stands for International System of Units and it comprises a complete metric system of units of measurement for scientists.
What are the fundamental units of length, mass, and time in the M.K.S. system?
In the M.K.S. system, the fundamental units are meter, kilogram, and second for length, mass, and time, respectively.
What are the seven fundamental quantities in the SI system?
The seven fundamental quantities in the SI system are length (meter), mass (kilogram), time (second), electric current (ampere), temperature (kelvin), amount of matter (mole), and luminous intensity (candela).
What are fundamental units?
Fundamental units are the units of fundamental quantities. These units are independent and cannot be broken down into other units.
What are derived quantities?
The quantities that cannot be defined on their own and can be broken down in terms of the base quantities are called the derived quantities.
What is the unit of amount of substance?
Mole is the SI unit of substance.
Candela is the SI unit of which physical quantity?
Candela is the SI unit of luminous intensity.
What is a systematic error?
Systematic errors arise due to instrumental errors, incorrect experimental techniques, and personal errors.
Compute the unit of velocity.
The SI unit of velocity is m/s.
Give an example of an instrumental error.
An example of an instrumental error is zero error in vernier calipers or screw gauge.
What is a random error (chance error)?
Random errors come from unpredictable changes in experimental conditions and make it give different results for the same measurements taken repeatedly.
How can random errors be reduced?
Random errors can be reduced by repeatedly taking a greater number of measurements.
What is a least count error?
Least count error is the error associated with the resolution of the instrument.
Test your understanding of physical quantities, fundamental and derived quantities, and their units. Explore the characteristic properties of systems and how they are quantified through measurement in the field of physics.
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