The output characteristics of a transistor is shown in the figure. When V CE is 10 V and I C = 4 .0   mA , then value of β ac is

Step-by-step solution

From the formula of current gain, β = Δi C Δi B V CE = 10 Δi C = 4 . 5 - 3   mA ⇒ Δi C = 1 . 5   mA ⇒ Δi C = 1 . 5 × 10 - 3   A Δi B = 30 - 20   μA ⇒ Δi B = 10   μA ⇒ Δi B = 10 × 10 - 6   A ⇒ Δi B = 10 - 5   A ⇒ β = Δi C Δi B V CE = 10 = 1 . 5 × 10 - 3 10 - 5 ⇒ β = 1 . 5 × 10 - 3 × 10 5 ⇒ β = 150