GATE EC 2006 Set 1 Q73 — BJT and MOSFET Amplifiers

Common Data for Questions 71, 72,73:

In the transistor amplifier circuit shown in the figure below, the transistor has the following parameters:
$$\beta_{\mathrm{DC}}=60, \mathrm{~V}_{\mathrm{BE}}=0.7 \mathrm{~V}, h_{n^{c}} \longrightarrow \infty, h_{f c} \longrightarrow \infty$$
 The capacitance $\mathrm{C}_{\text{c }}$ can be assumed to be infinite.

In the figure above, the ground has been shown by the symbol $\nabla$

The small-signal gain of the amplifier $v_{c} / v_{s}$ is