In the circuit given below, ß = 99 and Vbe = 0.7V. Find the value of collector current.

In the circuit given below, ß = 99 and Vbe = 0.7V. Find the value of collector current. In the circuit given below, ß = 99 and Vbe = 0.7V. Find the value of collector current.

Right Answer is:

0.99 mA

SOLUTION

Using the relationship between IC and IB:

IC = β * IB = 99 * IB

Where

β = DC current gain

IC = Collector current

IB = Base current

IC = 99IB

In the circuit given below, ß = 99 and Vbe = 0.7V. Find the value of collector current.

Applying KCL in loop 1:

-5 + 30(IB) + 0.7 + 4(IE) = 0

-5 + 30(IB) + 0.7 + 4(IB + IC) = 0

-5 + 30(IB) + 0.7 + 4(IB +99IB) = 0

-5 + 30(IB) + 0.7 + 4(100IB) = 0

430IB = 4.3

IB = 0.01 mA

IB = 10 μA

IC = 99IB

IC = 990 μA

or IC = 0.990 mA

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