What is the conductivity of a semiconduc

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Target Exam

CUET

Subject

Physics

Chapter

Semiconductors and Electronic Devices

Question:

What is the conductivity of a semiconductor if electron density = $5 × 10^{12}/cm^3$ and hole density = $8 × 10^{13}/cm^3$?

($μ_e = 2.3 V^{–1}s^{–1}m^2$ and $μ_h = 0.01 V^{–1}s^{–1}m^2$)

Options:

5.634

1.968

3.421

8.964

Correct Answer:

1.968

Explanation:

$σ = e (n_eμ_e + n_hμ_h)$