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5/12 MCQs for:

Experimental physics

Is a temperature of 30o C warm or cold to man?

Cold.

Warm.

What is the percent uncertainty in the measurement 2.58 ± 0.15 cm?

5.8%.

12%.

8.7%.

2.9%.

Four students each made a series of measurements of the acceleration of free fall g (in ms-2). The table shows the results obtained. Which student obtained a set of results that could be described as accurate but not precise?

D.

C.

B.

A.

Vernier calipers, reading to 0.1 mm, are used to find the internal diameter (10.0 ± 0.1 mm) and the external diameter (12.0 ± 0.1 mm) of a length of glass tubing. The mean wall thickness would be quoted, therefore, as

2.0 ± 0.1 mm.

2.0 ± 0.0 mm.

1.0 ± 0.1 mm.

1.0 ± 0.2 mm.

This gauge is most probably used to measure:

Current.

Speed.

Voltage.

Amplitude.