ACT Science Practice Question #1821 (Hard (500)) | Test Citadel
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ACT Science Difficulty: Hard (500)

Digital ACT Science Practice Question #1821

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Based on Table 23, doubling the electric current at a constant 100 turns (from 1.0 A to 2.0 A) causes the magnetic field B to: Experiment Context (Magnetic Field of an Air-Core Solenoid): Physics students measured the internal axial magnetic field B (in milliteslas, mT) of a 20 cm solenoid while varying electric current (I) and total number of wire turns (N): Table 23: - 100 turns, Current = 1.0 A: B = 0.63 mT - 100 turns, Current = 2.0 A: B = 1.26 mT - 100 turns, Current = 3.0 A: B = 1.88 mT - 200 turns, Current = 1.0 A: B = 1.26 mT - 200 turns, Current = 2.0 A: B = 2.51 mT - 400 turns, Current = 2.0 A: B = 5.03 mT
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Socratic AI Engine Step-by-Step Derivation
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Direct proportionality: doubling current doubles magnetic field.

Masterclass Solution & Distractor Trap Analysis

B is directly proportional to current (B = mu_0 * n * I). 0.63 * 2 = 1.26 mT....

Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...

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