1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anna007 [38]
3 years ago
8

Although the evidence is weak, there has been a concern in recent years over possible health effects from the magnetic fields ge

nerated by electric transmission lines. A typical high-voltage transmission line is 20 m above the ground and carries a 200 A current at a potential of 110 kV.
a. What is the magnetic field strength on the ground directly under such a transmission line?
b. What percentage is this of the earth's magnetic field of 50 ?T?
Physics
1 answer:
sergey [27]3 years ago
7 0

Answer:

a

The magnetic field strength is  B = 2 \mu T

Explanation:

From the question we are told that

             The  length line   above the ground  is  R = 20m

              The current of the line is  I  = 200A

              The voltage of the line is V = 110kV

Generally magnetic field strength is mathematically represented as

              B = \frac{\mu_o I}{2 \pi R}

Where  \mu_0 is the permeability of free space  = 4\pi * 10^{-7} N/A^2

             B = \frac{(4\pi * 10^{-7} N/A^2) *200}{2 \pi *20}

                = (2.0*10^{-7})[\frac{200}{20} ]

               = 2*10^{-6}T

              = 2 \mu T

Earths magnetic field is approximately given as 50 \mu T

   So the percentage would be

                           = \frac{Magnetic \ Field \ Intensity \ Of  \ Line}{Earth's \ Magnetic \ Field} * 100

                          = \frac{2 \mu T }{50 \mu T } * 100

                          =4%            

         

           

             

               

You might be interested in
An object is located 50.0 cm from a concave mirror. The magnitude of the mirror focal length is 25.0 cm. What is the image dista
ioda

Answer:

Correct answer: C. 50 cm

Explanation:

Given data:

The distance of the object from the top of the concave mirror o = 50.0 cm

The magnitude of the concave mirror focal length 25.0 cm.

Required : Image distance d = ?

If we know the focal length we can calculate the center of the curve of the mirror

r = 2 · f = 2 · 25 = 50 cm

If we know the theory of spherical mirrors and the construction of figures then we know that when an object is placed in the center of the curve, there is also a image in the center of the curve that is inverted, real and the same size as the object.

We conclude that the image distance is 50 cm.

We will now prove this using the formula:

1/f = 1/o + 1/d => 1/d = 1/f - 1/o = 1/25 - 1/50 = 2/50 - 1/50 = 1/50

1/d = 1/50 => d = 50 cm

God is with you!!!

6 0
3 years ago
Read 2 more answers
Consider the following examples of homeostatic regulation: In response to an increase in plasma K concentrations, secretion of t
TiliK225 [7]

Answer:

Both are examples of negative feedback regulation.

Explanation:

The maintenance of the homeostasis in the body is controlled by the the feedback regulation of the body. Two main types of feedback regulation are positive regulation and negative regulation.

The negative regulation occurs when the final product of the reactions inhibits the further secretion of that product. In the given examples of aldosterone and calcium mechanism, the secretion of aldosterone and calcium decreases as the normal levels are acheived in the body.

Thus, the answer is both are examples of negative feedback regulation.

5 0
3 years ago
All objects within a closed system tend to move
Charra [1.4K]

Explanation is in the file

tinyurl.com/wpazsebu

4 0
3 years ago
Chet believes that electric fields can impact objects only when the objects are in direct contact. Tonya disagrees with Chet. Wh
Murljashka [212]

B because it is the only evidence that displays an effect from the field without contact

3 0
3 years ago
Upon what basic quantity does kinetic energy depend?
natta225 [31]
The velocity of the object. because the greater the movement in particles the greater would be the kinetic energy. 
6 0
3 years ago
Other questions:
  • What is the relationship between lightning and thunder
    6·1 answer
  • 60mil/hr to m/s convert
    14·1 answer
  • At what vertical velocity should no object be launched at in order to achieve a height of 20m?​
    12·1 answer
  • A student performs an exothermic reaction in a beaker and measures the temperature. If the thermometer initially reads 35 degree
    11·2 answers
  • To be a healthy family, which of the statements below is TRUE:
    11·2 answers
  • The standard wave format for any wave is
    7·1 answer
  • Arocket launches at an angle of 33.6 degrees from the horizontal at a
    7·1 answer
  • An elevator of 3 × 10^4N is raised to a height of 100m in 20s . The work done by electric motor is equivalent to ?​
    15·1 answer
  • A series circuit has four resistors. The current through one resistor is 810 mA. How much current is supplied by the source?0.81
    8·1 answer
  • What is the symbol of the ion having 12 protons and 10 electrons?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!