If collector current Ic=4 mA and current gain B=45.Then emitter current Ie is

Physics class 12 mcqs solution  Inter class physics mcqs solution  Mdcat Physics mcqs solution  Electronics mcqs solution

Transcript

00:00The question says, if collector current is equal to 4 mA and current gain is 45, then

00:18the emitter current is a 4.1 mA, b 4.02 mA, c 4.4 mA, d 4.04 mA. We have to find the emitter

00:37current. So, is emitter current is equal to the sum of collector current and base current.

00:53So, here collector current is obtained, but base current is not obtained. So, first of

01:02all, we will find base current is current gain means beta is equal to the ratio of collector

01:16current and base current. So, we have to find base current. So, this equation will become

01:26is base current will be equal to collector current divided by current gain means beta. Because

01:37when we will take base current to the other side of equal, then it will multiply with beta.

01:44And when we will take beta on the other side of equal, then it will divide. So, now by putting

01:52the given value in the given value is collector current is obtained as 4 mA divided by current

02:05gain means beta which is 45. So, base current will be obtained as 4 divided by 45, then it will

02:19be 0.088 mA. Now, we will find emitter current which is equal to the sum of collector current

02:37and base current. So, emitter current will be equal to is collector current is obtained as

02:474.088 mA. So, emitter current will be equal to 4.088 mA because 4 plus 0.088 mA then it will

03:11be 4.088 mA. When we will round off this value then we will get 4.1 mA. So, the correct option

03:32will be A, 4.1 mA. So, the solution will be A, 4.1 mA. So, the solution will be A, 4.1 mA.

03:39So, the solution will be B and nó is about 802 mA. So, when you have more, you've already