Pls answer this Find the cross-sectional area of thecopper wire that has a resistance of2.15 mQ and 250 m long with theresistivity of 3.5 x 10–6 Qm.O 0.64 sq. m0.41 sq. m0.46 sq. mO 0.14 sq. m Calculate the emf of the battery ifthe potential drop in the circuit is 2.5V and battery's internal resistance of2 ohm, produces a power of 3 W.O4.95 VO4.8 VO 4.9 V4.99 V

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Answered: Find the cross-sectional area of the…

Find the cross-sectional area of the copper wire that has a resistance of 2.15 mQ and 250 m long with the resistivity of 3.5 x 10–6 Qm. 0.64 sq. m 0.41 sq. m 0.46 sq. m O 0.14 sq. m

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 71AP: A nichrome rod that is 3.00 mm long with a cross sectional area of 1.00 mm2 is used for a digital...

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Concept explainers

Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.

Question

Pls answer this

Find the cross-sectional area of the
copper wire that has a resistance of
2.15 mQ and 250 m long with the
resistivity of 3.5 x 10–6 Qm.
O 0.64 sq. m
0.41 sq. m
0.46 sq. m
O 0.14 sq. m

Calculate the emf of the battery if
the potential drop in the circuit is 2.5
V and battery's internal resistance of
2 ohm, produces a power of 3 W.
O4.95 V
O4.8 V
O 4.9 V
4.99 V

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