This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A certain metal wire has a cross-sectional area of 1.0 cm2 and a resistivity of 1.7 10-8 m. How ... (Read 85 times)

wenmo

  • Hero Member
  • *****
  • Posts: 540
on: Jul 29, 2018
A certain metal wire has a cross-sectional area of 1.0 cm2 and a resistivity of 1.7  10-8   m. How long would it have to be to have a resistance of 1.0 ?
 
  A) 5.9  104 m B) 590 m C) 5.9 m D) 5.9 km E) 5.9  106 m

Question 2

A thin copper rod 1.0 m long has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to balance the weight of the rod?
 
  A) 9.8 A B) 2.5 A C) 1.2 A D) 4.9 A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

owenfalvey

  • Sr. Member
  • ****
  • Posts: 337
Reply #1 on: Jul 29, 2018
Answer to Question 1

D

Answer to Question 2

D


wenmo

  • Member
  • Posts: 540
Reply 2 on: Jul 29, 2018
:D TYSM

apple

  • Member
  • Posts: 352
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

Did you know?

Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.

Did you know?

The familiar sounds of your heart are made by the heart's valves as they open and close.

Did you know?

The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").

Did you know?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

A typical pedestal grinder with a wire wheel on the left side and a stone wheel on the right side. ... A typical pedestal grinder with a wire wheel on the left side and a stone wheel on the right side. ...
Apply gentle circular friction to the temple area. Apply gentle circular friction to the temple area.
How to find the area of composite figures (Part 1) How to find the area of composite figures (Part 1)
Results of a cross involving two genes located on the same chromosome Results of a cross involving two genes located on the same chromosome
Cross-regulatory interactions between bithorax complex genes Cross-regulatory interactions between bithorax complex genes
Video: Stroke volume - contractility definition

For a complete list of videos, visit our video library