Earth's magnetic field is the force acting on the compass needle to cause it to point northeast.
Answer:
0.037 A
Explanation:
Magnetic field = B = 1.00 e-4 T
Length = L = 0.380 m
Number of turns = 810
B = μ₀ N I / L
⇒ Current = I = B L / μ₀ N = ( 1 e-4) ( 0.380) / (4π × 10⁻⁷)(810)
= 0.037 A = 37.3 mA
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Here is your answer:
The proper answer to this question is "because of there substantial size the rock rests on another rock which keeps it balanced".
If you need anymore help feel free to ask me!
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