(a) The system shown in Figure Q3 (a) includes a pipe, which goes from a 12 cm diameter to 8 cm diameter. The velocity in the 12 cm section is found to be 4.2m/s. An electromagnetic flow meter is connected to the 8 cm diameter pipe. (i) Calculate the average velocity in the 8 cm section. (ii) If the flux constant B = 2 tesla, calculate the voltage measured at the electromagnetic flow meter terminals. 12-cm diameter section 8-cm diameter section Electromagnetic flow meters

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The system shown in Figure Q3 (a) includes a pipe, which goes from a 12 cm
diameter to 8 cm diameter. The velocity in the 12 cm section is found to be 4.2m/s. An
electromagnetic flow meter is connected to the 8 cm diameter pipe.
(a)
(i)
Calculate the average velocity in the 8 cm section.
(ii)
If the flux constant B = 2 tesla, calculate the voltage measured at the
%3D
electromagnetic flow meter terminals.
12-cm diameter section
8-cm diameter
section
V2
Electromagnetic flow
meters
Figure Q3 (a)
(b)
Explain the Optical Sensors principle of operation.
(c) Discuss the Optical Sensors application in automatic door operation.
Transcribed Image Text:The system shown in Figure Q3 (a) includes a pipe, which goes from a 12 cm diameter to 8 cm diameter. The velocity in the 12 cm section is found to be 4.2m/s. An electromagnetic flow meter is connected to the 8 cm diameter pipe. (a) (i) Calculate the average velocity in the 8 cm section. (ii) If the flux constant B = 2 tesla, calculate the voltage measured at the %3D electromagnetic flow meter terminals. 12-cm diameter section 8-cm diameter section V2 Electromagnetic flow meters Figure Q3 (a) (b) Explain the Optical Sensors principle of operation. (c) Discuss the Optical Sensors application in automatic door operation.
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