Question

A given BJT has an emitter current of 15 mA and a collector current of 1495 mA What is the exact value of β ?

O 299
O 250
O 100
O 1.003

Answer 1

The exact value of β for a given BJT is approximately 100, calculated by using the collector and emitter currents, assuming there is a typographical error in the provided currents.

Step-by-step explanation:

The question pertains to the calculation of the current gain (β) of a Bipolar Junction Transistor (BJT). To find the exact value of β, which is defined as the ratio of the collector current (IC) to the base current (IB), we must first find the base current. The base current can be calculated by subtracting the collector current from the emitter current, thus IB = IE - IC. Given that the emitter current (IE) is 15 mA and the collector current (IC) is 1495 mA, we can calculate:

• IB = 15 mA - 1495 mA = -1480 mA (since the current flowing into the base must be subtracted).
• β = IC / IB = 1495 mA / 15 mA = 99.67.

The exact value of β in this case is close to 100, assuming the current values have a typographical error, since normally IE should be slightly greater than IC, not lesser.