Physics · JEE | Semiconductor Electronics: Materials, Devices and Simple Circuits

In a semiconductor in thermal equilibrium, the product of electron concentration \( n_e \) and hole concentration \( n_h \) satisfies which of the following mass action relations?

1. A
   \( n_e n_h = n_i^2 \)
2. B
   \( n_e n_h = n_i \)
3. C
   \( \frac{n_e}{n_h} = n_i^2 \)
4. D
   \( n_e + n_h = 2n_i \)