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ECNG1012 : Engineering Science and Technology (Semester I- 2024/2025)

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In what order must the following steps be performed to determine the RMS of a signal?

i) Square rooting function

ii) Mean/Averaging function

iii) Squaring function
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Which of the following statements are FALSE for Analog meters as compared to digital meters?

  1. Analog meters are harder to use than digital meters, since you need to interpret the meter's needle on its scale.

  2. Analog meters have relatively little effect on the circuit being measured as opposed to digital meters.

  3. Analog meters have a fixed impedance which does NOT change from scale to scale. 

  4. Analog ammeters have a fixed impedance which is usually ≥ 10MΩ

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When measuring energy storage devices (e.g. capacitors, inductors) on the LCR/ESR meter or some of the other meters, it is IMPORTANT to discharge them before connecting them to the meter as the release of energy into the meter may seriously damage the meter.

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Which buttons are used to set the primary and secondary displays on the LCR/ESR meter?

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In order to measure the parasitic resistance (series resistance) of an capacitor using the LCR meter in the diagram below, what sequence of actions must be performed to facilitate measurement?

i. Ensure that the appropriate cables are connected to the LCUR LPOT HCUR HPOT terminals.

ii. Power on the LCR/ESR meter.

iii. Press and release L/C/Z/DCR Function key a few times until the primary display turns to Cp.

iv. Press and release L/C/Z/DCR Function key a few times until the primary display turns to Cs.

v. Press and release D/Q/θ/ESR Function key a few times until the secondary display turns to ESR.

vi. Press and release D/Q/θ/ESR Function key a few times until the secondary display turns to D.

vii. Attach the clips to the end of the device that is to be measured.

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In order to measure the parasitic resistance (series resistance) of an inductor using the LCR meter in the diagram below, what sequence of actions must be performed to facilitate measurement?

i. Ensure that the appropriate cables are connected to the LCUR LPOT HCUR HPOT terminals.

ii. Power on the LCR/ESR meter.

iii. Press and release L/C/Z/DCR Function key a few times until the primary display turns to Lp.

iv. Press and release L/C/Z/DCR Function key a few times until the primary display turns to Ls.

v. Press and release D/Q/θ/ESR Function key a few times until the secondary display turns to ESR.

vi. Press and release D/Q/θ/ESR Function key a few times until the secondary display turns to Q.

vii. Attach the clips to the end of the device that is to be measured.

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When measuring an AC voltage with the multi-meter, the reading obtained is the:
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