State two advantages and two disadvantages of photoelectric pick-up speed measurement method.

State two advantages and two disadvantages of photoelectric pick-up speed measurement method.
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1 Answer

Answer :

Advantages :

1) It is digital instrument so high accuracy. 2) Pulse amplitudes are constant. 3) This simplies the electronic circuitry.


Disadvantages :

1) Light source must be replaced time to time. 2) The accuracy depends on the error represented by one pulse.

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