Measurement and Instrumentation
A CRO probe has an impedance of 500 kΩ in parallel with a capacitance of 10 pF. The probe is used to measure the voltage between P and Q as shown in figure. The measured voltage will be

 5 V.
 4.54 V.
 3.53 V.
 4.38 V.

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Measurement and Instrumentation
The measurment of very low and very high frequencies is invariably done using a frequency counter in which one of the following?

 Frequency measurment modes only.
 Period measurment modes only.
 Frequency and period measurment modes, respectively.
  Period and frequency measurement modes respectively.

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