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

 4.38 V.
 4.54 V.
 3.53 V.
 5 V.

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Measurement and Instrumentation
Assertion (A) : Precision is a necessary prerequisiteof accuracy. Reason (R) : Precision guarantees accuracy.

 Both A and R are true and R is the correct explanation of A
 A is true but R is false
 Both A and R are true but R is NOT the correct explanation of A
 A is false bur R is true

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Measurement and Instrumentation
The time/div and voltage axes of an oscilloscope have been creased. A student connects a 1 KHz, 5 V P-P square wave calibrition pulse to channel-1 of the scope and observes the screen to be as shown in the upper trace of figure. An unknown signal is connected to channel-2 (lower trace) of the scope. If the time/div and V/div on both channels are the same, the amplitude (P-P) and period of the unknown signal are respectively

 5 V, 1 ms.
 10 V, 1 ms.
 5 V, 2 ms.
  7.5 V, 2 ms.

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