Hall probe is a device widely used for measuring magnetic field strengths.One Hall probe consists of a current carrying strip of bismuth that is 0.20 mm thick and 4 mm wide.The charge carrier density of bismuth is 1.35 * 10²⁵ m^-3.When the strip is placed in a magnetic field perpendicular to the direction of 2.1-A current,it develops a Hall voltage of 3.5 mV across the strip.The strength of the magnetic field is

Question

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The Hall voltage (V_H) is given by V_H = (B * I) / (n * e * t), where B is the magnetic field strength, I is the current, n is the charge carrier density, e is the elementary charge (approximately 1.6 * 10^-19 C), and t is the thickness of the strip. Rearranging for B and substituting the given values, we find B = 0.72 T.

Hall Probe Is a Device Widely Used for Measuring Magnetic