Physics Practice Test – Units, Measurement and Dimensional Analysis

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A student measures the volume of a liquid using a measuring cylinder. What else needs to be measured by the student in order to determine the density of the liquid? 

A. Depth of the liquid in the cylinder
B. Mass of the cylinder.
C. Mass of the liquid
D. Temperature of the liquid



The diagram above represents a section of a pair of vernier calipers. The reading on the instrument is _____

A. 5.22 cm     B. 5.24 cm     C. 5.25 cm     D. 5.26 cm

The weight of a body is measured with _______

A. spring balance.     B. beam balance.     C chemical balance.     D. lever balance.

Which of the units of the following physical quantities is not a derived unit?

A. Area     B. Thrust     C. Pressure     D. Mass

Which of the following units is derived?

A. kg     B. m      C. K      D. N

Which of the following units is equivalent to the Watt? 

A. kgms-2       B. kgm2s-3       C. kgm2s-2       D. kgm2s-1

Which of the following is a fundamental quantity?

A. Speed     B. Density     C. Length     D. Impulse
Which of the following statements about a spring balance and/or a chemical balance is not correct?

A. The chemical balance: operates on the principle of moments
B. The spring balance operates on Hooke’s law
C. Either may be used to measure the weight of a substance
D. The reading of a spring balance changes over the surface of the earth, while that of the chemical balance remains constant.

Which of the following is a fundamental quantity?

A. Heat capacity     B. Electric current     C. Torque     D. Reactance

Which of the following statements about the mass and the weight of a body is not correct? It’s ______

A. mass is a scalar quantity
B. weight is a function of the gravitational pull on it
C. mass on earth and on the moon is the same
D. weight at the equator and at the poles is the same

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