When a current I₁ = 1.3 A passes through a wire of cross-sectional area A₁ = 5 mm² the drift velocity of the charge carriers is v₁ = 2.7 × 10^-5 m/s. What is the drift velocity of the charges when a current I₂ = 0.5 A passes through a wire, made of the same material of cross-sectional area A₂ = 3 mm²?

Question

Quizplus · Accepted Answer

The drift velocity is proportional to the current and inversely proportional to the cross-sectional area. Using the formula v = I/nAe, where n and e are constants, we find v2 = (I2 * A1 * v1) / (I1 * A2) = (0.5 * 5 * 2.7 × 10^-5) / (1.3 * 3) = 1.7 × 10^-5 m/s.

When a Current I1 = 1

When a Current I₁ = 1