Physical quantities and measurement

Which of the following is a basic unit?

• area

• volume

• distance

• density

Which of the following pairs of physical quantity and SI unit is correct ?

• Mass - SI unit : Gram
• Time - SI unit : Hour
• Electric current - SI unit : Volt
• Temperature - SI unit : Kelvin

Which of the following best describe a vector quantity?

• it has magnitude

• it has direction

• it has both magnitude and direction

• it has magnitude but differ in direction

How can we minimize random errors?

• by collecting more data

• by recalibrating the instrument

• by asking someone to repeat the process

• by changing the data

It refers to how close a measurement is to the correct value.

• Absolute measurement

• Accuracy

• Precision

• Prediction

What is the correct symbol and SI unit for force

• F and si unit: Pa

• F and SI unit: N

• W and SI unit: Nm

• F and SI unit:N/m

Dimension is defined as

• A method which physical quantity expressed in terms of scalar and vector quantity.

• A technique which physical quantity can be expressed in terms of combination of derived quantities.

• A technique which physical quantity can be expressed in terms of combination of basic quantities.

Which of the following is the right DIMENSION and SI UNIT for Force

• A

• B

• C

• D

Which of the following are examples for basic quantities?

• Length, velocity, mass, time

• Current, acceleration, pressure, luminous intensity

• Temperature, Current, Time, Mass

• Frequency, Area, Length, Time

Which of the following instruments best to measure the thickness of paper?

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