An experiment on the earth's magnetic field (5.5 10-5 t) is being carried out 4.8 m from an electric cable. what is the maximum allowable current in the cable if the experiment is to be accurate to 1.0% ?

13.2 A

Explanation:

Earth's magnetic field B= 5.5×10^{-5} T

the distance r= 4.8 m

the permeability of free space μ_o=

according to Biot Savart law

therefore, current in the table is

solving we get I= 1320 A

if the experiment is to be accurate to 1.0%

then the allowed value of current in the cable

I'= I(1%)

=

= 13.2 A

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

b) returns freshwater to the earth.

c) returns freshwater to the earth.c) occurs after condensation.

d) returns freshwater to the earth.c) occurs after condensation.d) roughly equal to the amount of evaporation.

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