Engineering High School

4 A metal wire of length 1cm and of uniform diameter has a resistance 0.8ohms. What is the resistance of a 50 cm. wire coil made of the same material but having twice it's diameter.​

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Answer 1

Answer:

None of the above. Resistance is directly proportional to length, inversely proportional to cross-sectional area. Pay attention in class, and observe that even easy multiple choice questions can have only wrong answers if the setter makes a mistake.

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A(n) ___ is an electric device that uses electromagnetism to change (step up or step down) AC voltage from one level to another. Question 3 options: A) rectifier B) transformer C) inverter D) converter

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Answer:

A transformer is an electric device that uses electromagnetism to change voltage from one level to another or to isolate one voltage from another.

When operating at a non towered airport, pilots communicate on

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i do not know can i get brainliest im broke

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