The metric unit is the Newton (N), or the 
A cow walks 40 m east to rest under a tree. Later, she walks 25 m north to eat a patch of clover. What is the magnitude of her d
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<h2>C. 20 T</h2>
The strength of the magnetic field is equal to 20 Tesla.
<h3>Explanation:</h3>Given:
Induced potential difference = V = 12 V
Length of wire = L = 0.20 m
Speed of the moving wire = V = 3.0 m/s
Magnetic field strength = B = ?
A conductor, placed in a uniform magnetic field; when moved at a constant speed with respect to the field, leads to a changing magnetic flux, generating an electromotive force (EMF). Using, Faraday's law of magnetic induction, a moving conductor's induced EMF in terms of the magnetic field strength is given by :
......................(1)
where
E = Induced potential difference (EMF)
L = Length of the conductor
V = Speed of the conductor moved with respect to the magnetic field
B = Strength of uniform magnetic field
Rewriting equation (1) for B, we get
The strength of magnetic field is equal to 20 Tesla.