Magnetic fields, motor, generator, electromagnetic induction basics.
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Q1 · Magnetic Effects of Current · MEDIUM
A straight conductor carrying current of 5 A is placed perpendicular to a magnetic field of 0.4 T. If the length of the conductor in the field is 25 cm, what is the force experienced by it?
Q2 · Magnetic Effects of Current · HARD
A solenoid has 500 turns and carries a current of 2.5 A. If the magnetic field inside the solenoid is 0.01 T, what is the approximate length of the solenoid? (Take μ₀ = 4π × 10⁻⁷ T·m/A)