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Answer: d
Explanation: Use the relation α = β/(β+1).
To find the common-emitter current gain (β) from the forward current gain (α), you can use the relationship:
[
beta = frac{alpha}{1 – alpha}
]
Given α = 0.97, we can substitute this value into the formula:
[
beta = frac{0.97}{1 – 0.97} = frac{0.97}{0.03} approx 32.33
]
So, the value of β is approximately 32.33.