Introduction To Physics Form 4 KBSM

Physical quantities

• Physical quantities that cannot be defined in terms of other quantities

• Physical quantity obtained from the combination of base quantities through multiplication or division or both

• Quantities that can be measured

Answer explanation

Quantity can be classified into two types; they are physical and non-physical quantity. Physical Quantities are those quantities that can be measured, either directly or indirectly. ... Some example of non-physical quantities are: Feelings, Angriness, Rudeness, etc. No one can measure the feeling of a person, or love, etc.

Base quantities

• Physical quantities that cannot be defined in terms of other quantities

• Physical quantity obtained from the combination of base quantities through multiplication or division or both

• Quantities that can be measured

Answer explanation

Derived quantities

• Physical quantities that cannot be defined in terms of other quantities

• Physical quantity obtained from the combination of base quantities through multiplication or division or both

• Quantities that can be measured

Answer explanation

Base units

• Units that cannot be defined in terms of other units

• Units which are obtained from the combination of base units through multiplication or division or both

Answer explanation

Derived units

• Units that cannot be defined in terms of other units

• Units which are obtained from the combination of base units through multiplication or division or both

Answer explanation

Consistency

• The closeness of a measurement to the actual value

• The ability (of a measuring instrument) to measure a quantity with little or no deviation among the measurements

• The ability (of a measuring instrument) to detect a small change in the quantity to be measured

• The difference between the measured value and the actual value

Answer explanation

Accuracy

• The closeness of a measurement to the actual value

• The ability (of a measuring instrument) to measure a quantity with little or no deviation among the measurements

• The ability (of a measuring instrument) to detect a small change in the quantity to be measured

• The difference between the measured value and the actual value

Answer explanation

Sensitivity

• The closeness of a measurement to the actual value

• The ability (of a measuring instrument) to measure a quantity with little or no deviation among the measurements

• The ability (of a measuring instrument) to detect a small change in the quantity to be measured

• The difference between the measured value and the actual value

Error

• The closeness of a measurement to the actual value

• The ability (of a measuring instrument) to measure a quantity with little or no deviation among the measurements

• The ability (of a measuring instrument) to detect a small change in the quantity to be measured

• The difference between the measured value and the actual value

Systematic errors

• Errors due to the mistakes made by the observer when taking measurement either through incorrect positioning of the eye or the instrument

• Error due to the incorrect positioning of the eye when reading a measurement

• Errors in the calibration of instruments or the non-zero reading when the actual reading should be zero

• The non-zero reading when the actual reading should be zero that is the pointer of the instrument does not return to the zero position when it is not being used

Answer explanation