For a transistor the value of `alpha` is `0.9`. `beta` value is

Options

A. 1
B. 0.09
C. 0.9
D. 9

Answer

To find the value of beta (β) given the value of alpha (α) for a transistor, we can follow these steps:

### Step 1: Understand the relationship between alpha and beta
The relationship between alpha (α) and beta (β) is given by the formula:
\[ \beta = \frac{\alpha}{1 - \alpha} \]

### Step 2: Substitute the value of alpha
Given that α = 0.9, we can substitute this value into the formula:
\[ \beta = \frac{0.9}{1 - 0.9} \]

### Step 3: Calculate the denominator
Calculate \(1 - 0.9\):
\[ 1 - 0.9 = 0.1 \]

### Step 4: Substitute the denominator back into the equation
Now, substitute back into the equation for beta:
\[ \beta = \frac{0.9}{0.1} \]

### Step 5: Perform the division
Now, perform the division:
\[ \beta = 9 \]

### Final Answer
Thus, the value of beta (β) is 9.

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