If a CRO maximum input is 10 V, then which of these probes can be used to measure 60 V? 

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RRB ALP Instrument Mechanic 23 Jan 2019 Official Paper (Shift 1)
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  1. 30 x
  2. 1000 x
  3. 1 x
  4. 10 x

Answer (Detailed Solution Below)

Option 4 : 10 x
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Detailed Solution

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The correct option is 4

Concept:

  • As the given input limit is 10 V and we have to measure the 60 V DC. Then suitable lowest scale probe would be 10 X.
  • Because it provides a measurement range of up-to 100 V.
  • We can’t use 1 X scale probe here, because it provides measurement up-to 10 V only.
  • While we can use 100 X & 1000 X scale probe for measuring 250 V DC as it provides measurement up-to 1000 V & 10000 V respectively.
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