Measuring Instruments Quiz

What is a physical quantity?

• A measurement without units

• Any physical property that can be measured with numbers and units

• A theoretical value only used in science

• A random number used for calculations

Which of the following is NOT a physical quantity?

• Voltage

• Frequency

• Resistance

• Color

Why do we need measuring instruments?

• To guess the values of physical quantities

• To ensure accuracy and precision in measurements

• To make work more difficult

• To avoid using numbers

What is accuracy in measurement?

• The closeness of a measurement to the true value

• The ability to measure any quantity

• The number of decimal places used

• The measurement that is repeated the most

What is precision?

• A measurement close to the true value

• Measurements that are close to each other

• A method to avoid errors

• The ability to use an instrument correctly

What is the loading effect of a measuring instrument?

• The disturbance caused by the instrument to the electrical properties of a circuit

• The weight of the measuring instrument

• The ability of an instrument to measure high voltages

• The impact of a circuit on the instrument

How does a voltmeter connect in a circuit?

• In series

• In parallel

• Independently

• It does not connect to the circuit

What type of instrument is used to measure electrical resistance?

• Voltmeter

• Ammeter

• Ohmmeter

• Oscilloscope

What are the two major types of measuring instruments?

• Electrical and mechanical

• Analog and digital

• Scientific and non-scientific

• Simple and complex

What is a major advantage of digital instruments over analog ones?

• They are less accurate

• They consume more power

• They provide numerical readings

• They are less expensive