\(\beta \,\, = \,\,\frac{\alpha }{{1\,\, - \,\,\alpha }}\,\, \Rightarrow \,\,75\,\, = \,\,\frac{\alpha }{{1\,\,\, - \,\,\alpha }}\,\, \Rightarrow \,\,75\,\, - \,\,75\,\,\alpha \,\, = \,\,\alpha \,\,\)

અથવા \(76\,\alpha \, = \,\,75\) અથવા \(\alpha \,\, = \,\,\frac{{75}}{{76}}\,\,\)

\(\alpha \,\, = \,\,\frac{{{I_c}}}{{{I_e}}}\,\,\,\,\therefore \,\,{I_c}\,\, = \,\,\alpha {I_e}\,\, = \,\,\frac{{75}}{{76}}\,\, \times \,\,5\,\, = \,\,4.93\,\,mA\)