"What happens to the resistance of a piece of wire, if it is bent and folded at the midpoint doubling the cross sectional area and halving the length?" doubles halves quadruples quarters none of these

"What happens to the resistance of a piece of wire, if it is bent and folded at the midpoint doubling the cross sectional area and halving the length?" doubles halves quadruples quarters none of these

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter16: Installation Of Heating, Cooling, And Refrigeration Systems

Section: Chapter Questions

Problem 7RQ

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Concept explainers

Photoelectric

The photoelectric effect occurs when light (or similar incident radiation, including X-rays) falls on material together with a metal plate and causes it to emit electrons. The discovery of the photoelectric effect led to important new theories (and to a Nobel Prize for Albert Einstein). Photoelectric cells, or photocells, are utilized in burglar-alarm light detectors and garage-door openers (each employs a through-beam of light this is broken when something movements throughout it), and also to play soundtracks on film movies (in which a light beam shines through the soundtrack encoded at the film and is "read" with the aid of the photocells).

Question

"What happens to the resistance of a piece of wire, if it is bent and folded at the midpoint doubling the cross sectional area and halving the length?"

		doubles
		halves
		quadruples
		quarters
		none of these

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