Question

An extrinsic semiconductor shown in the figure carries a current of 2 mA along its length parallel to the $+x$ axis.

When the majority charge carrier concentration is $12.5 \times 10^{13} \, \text{cm}^{-3}$ and the sample is exposed to a constant magnetic field applied along the $+z$ direction, a Hall voltage of 20 mV is measured with the negative polarity at the $y = 0$ plane. Take the electric charge as $1.6 \times 10^{-19}$ C. The concentration of minority charge carriers is negligible. Which of the following statements is/are true?

• A. The majority charge carrier is electron
• B. The magnitude of the applied magnetic field is 1 Tesla
• C. The electric field corresponding to the Hall voltage is in the +y direction
• D. The magnitude of the Hall coefficient is $50,000 \, \text{m}^3 \text{C}^{-1}$.

Answer 1

Answer: (A), (B)

The majority charge carrier is electron

Answer 2

The correct Answers are (A):The majority charge carrier is electron , (B):The magnitude of the applied magnetic field is 1 Tesla,