Home
Class 12
PHYSICS
In n-p-n transistor circuit, the collect...

In n-p-n transistor circuit, the collector current is 20 mA. If `90%` of the electrons emitted reache the collector, then the

A

Emitter currect will be about 16 mA

B

Emitter current will be 19 mA

C

Base current will be about 2 mA

D

Base current will be about 10 mA

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem, we need to find the emitter current (Ie) and the base current (Ib) in an n-p-n transistor circuit given the collector current (Ic) and the percentage of electrons that reach the collector. ### Step-by-Step Solution: 1. **Identify Given Values:** - Collector current (Ic) = 20 mA - Percentage of electrons reaching the collector = 90% 2. **Relate Collector Current to Emitter Current:** - The collector current (Ic) is 90% of the emitter current (Ie). This can be expressed mathematically as: \[ Ic = 0.90 \times Ie \] 3. **Substitute the Known Value of Ic:** - We can substitute the value of Ic into the equation: \[ 20 \, \text{mA} = 0.90 \times Ie \] 4. **Solve for Emitter Current (Ie):** - Rearranging the equation to solve for Ie gives: \[ Ie = \frac{20 \, \text{mA}}{0.90} \] - Performing the calculation: \[ Ie = \frac{20}{0.90} = 22.22 \, \text{mA} \, (\text{approximately } 22 \, \text{mA}) \] 5. **Calculate the Base Current (Ib):** - The base current (Ib) can be found using the relationship: \[ Ib = Ie - Ic \] - Substituting the values we found: \[ Ib = 22 \, \text{mA} - 20 \, \text{mA} = 2 \, \text{mA} \] 6. **Final Result:** - The base current (Ib) is 2 mA. ### Summary: - Emitter Current (Ie) = 22 mA - Base Current (Ib) = 2 mA
Promotional Banner

Similar Questions

Explore conceptually related problems

In an n-p-n transistor, the collector current is 10 mA. If 90% of the electrons emitted reach the collector, then the emitter current will be

In a n-p-n transister circuit the collector current is 9 mA . If 90% of the electrons emitted reach the collector, find emitter current and base current

In npn transistor circuit, the collector current us 10 mA. If 95 % of the electrons emitted reach the collector what is the free current ?

In a n-p-n transistor circuit, the collector current is 10 mA. If 80 percent of electrons emitted reach to the collector. Then the base current (in mA) will be

In an n-p-n transistor circuit , the collector currents is 10mA . If 95 per cent of the electrons emitted reach the collector, which of the following statements are true?

In a n - p - n transistor circuit, the collector current is 10 mA . If 95 per cent of the electrons emitted reach the collector, which of the following statements are true ?

In n-p-n transistor circuit, the collector current is 10 mA . If 90% of the holes reach the collector, find emitter and base currents.

In an n-p-n circuit transistor, the collector current is 10 mA. If 80% electrons emitted reach the collector, then

In an NPN transistor the collector current is 10 mA . If 90% of electrons reach collector, the emitter current (i_(E)) and base current (i_(B)) are given by

In an NPN transistor the collector current is 24 mA . If 80% of electrons reach collector it base current in mA is