Question

A transistor has a β of 250 and a base current, Ib, of 20 μA. The collector current, Ic, equals

Answer 1

Answer: The collector current  Ic is equal to 5mA.

Explanation:

β is the common-emitter current gain of a transistor. It is the ratio of the transistor's collector current and the transistor's base current. Which is given as,

$\beta=\frac{I_c}{I_b}$                 (1)

Where,

β=current gain

Ic=current through the collector of the transistor

Ib=current through the base of the transistor

From the question we have,

β=250

Ib=20μA

By substituting the value of β and Ib in equation (1) we get;

$250=\frac{I_c}{20\mu A}$

$I_c=250\times 20\mu A=5000\mu A=5000\times 10^-^6A=5\times 10^-^3A=5mA$

Hence, the collector current  Ic is equal to 5mA.

Answer 2

Answer:

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