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What is a motion sensor?



 
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What is a motion sensor? #1 (permalink) Sat Jun 05, 2010 8:57 am   What is a motion sensor?
 

English Grammar Tests, Elementary Level

ESL/EFL Test #290 "Electronic Devices (1)", question 1

A .........-sensor is a security device that turns on an outdoor light if someone walks near the device.

(a) speaker
(b) motion
(c) move
(d) jog

English Grammar Tests, Elementary Level

ESL/EFL Test #290 "Electronic Devices (1)", answer 1

A motion-sensor is a security device that turns on an outdoor light if someone walks near the device.

Correct answer: (b) motion
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is move-sensor right?
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What is a motion sensor? #2 (permalink) Sat Jun 05, 2010 9:19 am   What is a motion sensor?
 

No, this is a specific technical term. You may hear some people speaking about a 'movement sensor', but the correct term is 'motion sensor'.
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