A low pressure of the order of 10-10 torr is to be measured in a chamb – McqOptions

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1.	A low pressure of the order of 10-10 torr is to be measured in a chamber. Which of the following device can be used for this?
A.	McLeod gauge
B.	Pirani gauge
C.	Manometer
D.	Bourdon vacuum gauge
E.	Ionisation chamber
Answer» F.

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