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25 January, 18:51

You are performing an experiment that requires the highest possible energy density in the interior of a very long solenoid. Which of the following increases the energy density? (Select all that apply.)

a. Increasing only the length of the solenold while keeping the turns per unit lengh flxed

b. increasing the number of turns per unit length on the solenold

c. increasing the cross-sectional area of the solenoid

d. none of these

e. increasing the current in the solenoid

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Answers (1)
  1. 25 January, 19:10
    0
    b. increasing the number of turns per unit length on the solenoid

    e. increasing the current in the solenoid

    Explanation:

    As we know that energy density depends on the strength of the magnetic field. The magnetic field strength depends on the no of turns of the solenoid and the current passing through it. The greater the number of turns per unit length, greater the current passing through it, more stronger the magnetic field is. As

    B = μ₀nI

    n = no of turns

    I = current through the wire

    So the right options are

    b. increasing the number of turns per unit length on the solenoid

    e. increasing the current in the solenoid
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