Question

Suppose a magnetic field of 0.20 T is applied to the area within a circular loop of wire. The strength of the field is then changed to 0.10 T. By what factor is the magnetic flux changed?

2

4

1/2

1/4

Answer 1

IrishBoy123 Are you there?

Answer 2

flux = \(\Phi = B \times A\) where B is the magnetic field strength and A is the Area.
so, \(\frac{\Phi_2}{\Phi_1} = \frac{0.1T}{0.2T}.\frac{A}{A} = \frac{0.1}{0.2}\)
Clearly you need to study the small print : " By what factor is the magnetic flux changed?"

http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/fluxmg.html

Answer 3

Ok so 0.5 which would then make the answer

C. 1/2

Answer 4

Thank you

Answer 5

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