General Physics 1

Physical quantities which do not depend on any other physical quantities for their measurements.

• Systematic

• Derived

• Fundamental

• Accurate

Which of the following is a measurement unit?

• Meter

• Yard

• Inch

• All are correct

The following are systematic error except:

• Instrumental Error

• Loading Effect

• Misuse of instrument

• Carelessness in measuring

A measuring tape can measure length more than a/an .

• inch but less than a foot

• foot but less a meter

• Meter

• Inch

Martin is conducting an experiment. His first test gives him a yield of 5.2 grams. His second test gives him a yield of 1.3 grams. His third test gives him a yield of 8.5 grams. On average, his yield is 5.0 grams, which is close to the known yield of 5.1 grams of substance. Which of the following are true?

• His results are accurate but not precise

• His results are precise but not accurate

• His results are both accurate and precise.

• His results are neither accurate nor precise.

How can the effect of random errors be reduced?

• Repeating the measurement numerous times and averaging the result.

• Calibrating instruments correctly.

• Perfecting experimental technique.

• Always taking measurements under standard conditions.

These terms are often used to describe the reliability of measurements.

• Measurement and unit

• Length and Height

• Accuracy and Precision

• All are correct

True or False. Accuracy is a description of systematic error.

True or False. The closeness of two or more measurements to each other is known as the accuracy of a measurement.