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Which of the following is NOT true for an analogue/digital multimeter?
1. Increase or decrease in signal levels can be observed.
2. A sudden change in signal can be detected by analogue multimeter more swiftly than a digital multimeter.
3. All measurements are possible by using one meter only
4. Digital meters are bulky and costly.

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Correct Answer - Option 4 : Digital meters are bulky and costly.

Explanation:

Multimeter:

  • A multimeter is an electronic instrument. It is mainly used to measure the three basic electrical characteristics of voltage, current, and resistance.
  • It can also be used to test continuity between two points in an electrical circuit.
  • The multimeters can not be used to measure electrical quantities such as frequency, charge, etc.
  • The multimeter has multi functionalities like, it acts like ammeter, voltmeter, and ohmmeter.
  • It is a handheld device with a positive and negative indicator needle over a numeric LCD digital display.
  • An increase or decrease in signal levels can be observed. Hence option (1) is true.
  • Multimeters can be used for testing batteries, household wiring, electric motors, and power supplies.
  • All measurements are possible by using one meter only. Hence option (3) is true.
  • Digital multimeters are more accurate than analog multimeters.
  • The primary difference between the two is the display, an analog multimeter uses a needle to show the value, while a digital multimeter will show the results as numbers on a screen.
  • The analog multimeter also exhibits low resistance and high sensitivity with scales down, hence a sudden change in the signal can be detected by analogue multimeter more swiftly than a digital multimeter. So option (2) is true.
  • Analog multimeters are more bulky and costly than a digital multimeter, hence option(4) is not true.

Hence option (4) is the correct answer.

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