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For a transistor, in a common emitter arrangement, the alternating current gain $\beta$ is given by
  • A$\beta=\left(\frac{\Delta I_C}{\Delta I_B}\right)_{V_C}$
  • B$\beta=\left(\frac{\Delta I_B}{\Delta I_C}\right)_{V_C}$
  • C$\beta=\left(\frac{\Delta I_C}{\Delta I_E}\right)_{V_C}$
  • D$\beta=\left(\frac{\Delta I_E}{\Delta I_C}\right)_{V_C}$
[DPMT 2004]
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