In a transistor if increase in emitter current is 4 mA and corresponding increase in collector current is 3.5 mA. Find \(\beta\)
a] .875
b] .5
c] 7
d]1
\(\triangle I_E=4 \)
\(\\ \\ \\ \triangle I_c=3.5 \)
\(\ \\\alpha={\triangle I_c \over \triangle I_E} ={ 3.5\over4}={7\over8} \\ \\\)
\( \beta={ \alpha\over1-\alpha}={{7\over8}\over 1- {7\over8}}=7\)
Hence , option {C} is correct
7