major disadvantage of using a photoelectric sensor using the opposed sensing met

Question

major disadvantage of using a photoelectric sensor using the opposed sensing method is: 1. a) Cannot detect transparent objects b) Not good for small object detection c) Short sensing distance d) All of the above 2.- The strain gauges are mainly used for measuring temperature in liquids. a) True b) False For measuring level from 0 to 4 meters in a tank, it is installed some ultrasound device, consisting of a transmitter and a receiver, and installed at the 4 m level. It was send a testing signal, received 20 msec latter. Take the sound speed in the air as 340 m/sec. The water level in the tank is: a) 1.7 m b) 3.4 m c) 2.3 m d) 0.6 m 4. Assu ming the values of all resistors connected to a difference op-amp are the same, what is the output voltage when +3 V is applied to the inverting input and +1 V is applied to the noninverting input. a) +1 V b) -2V c) +4 V d) +2 V

Explanation / Answer

1.option A

2.option A

3.option B

first divide the radius by 2 den square the radius den multiply it to the pi to get the volume.convert the cubic feet

according to our volume.

4.option A

Related Questions

Navigate

• Browse (All)
• Browse M
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.