A car generator turns at 400 rpm when the engine is idling. Its 300 turn, 5.1 cm by 8.1 cm rectangular coil rotates in an adjustable magnetic field so that it can produce sufficient voltage even at low rpms. Randomized Variables

d₁ = 5.1 cm d₂ = 8.1 cm ₀ = 24.5 V

What is the field strength (in T) needed to produce a 24.5 V peak emf?