Amagnetic field is created by a charged particle that is a) balanced. b) motionless. c) moving. d) unbalanced.

Option (C) is the correct answer.

Explanation:

It is known that current is the flow of electrons or electric charges.

And when electric current flows through a wire or material then it generates a magnetic field outside the material.

Mathematically,     B =

where        B = magentic field

        = magnetic permeability

                   r = radial distance

Therefore, we can conclude that a magnetic field is created by a charged particle that is moving.

a and c are the answeres

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg