An Instrument Is Rated At $250 \mathrm {~W}$ If It Is Connected Across A

question 17

Short Answer

An instrument is rated at $250 \mathrm {~W}$ if it is connected across a $120 - \mathrm { V }$ dc power supply.
(a) What current does it draw under normal operation?
(b) What is its resistance?
(c) How many kilowatt-hours does it use in a day if it is left on all the time?

---

Definitions:

Load Cell

A device used to measure weight or force by converting a mechanical load into an electrical output signal.

Capacitive Proximity Sensor

A type of sensor that can detect the presence or absence of objects through changes in the electric field, without requiring physical contact.

Ultrasonic Sensor

A type of sensor that uses ultrasonic sound waves to detect the presence, distance, or speed of objects, used in various applications including automation and robotics.

Solenoid Valves

Electromechanical valves controlled by electric current to open or close flow in a hydraulic or pneumatic system.