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In an NPN transistor circuit, the collector current is 10mA. If 95 per cent of the electrons emitted reaches the collector, which of the following statements are true?
In an NPN transistor circuit, the collector current is 10mA. If 95 per cent of the electrons emitted reaches the collector, which of the following statements are true?
CBSE | Class 12 | NCERT Exemplar | Physics | Semiconductor Electronics: Materials, Devices and Simple Circuits
In an NPN transistor circuit, the collector current is 10mA. If 95 per cent of the electrons emitted reaches the collector, which of the following statements are true?

(a) The emitter current will be 8 mA

(b) The emitter current will be 10.53 mA

(c) The base current will be 0.53 mA

(d) The base current will be 2 mA

Answer:

The correct options are:

(b) The emitter current will be 10.53 mA

(c) The base current will be 0.53 mA

Explanation:

According to the question,

$ {{I}_{c}}=10mA $

$ {{I}_{c}}=95%\times {{I}_{e}} $

$ {{I}_{c}}=\frac{95}{100}\times {{I}_{e}} $

$ {{I}_{e}}=\frac{10mA\times 100}{95} $

$ {{I}_{e}}=10.53mA $

$ {{I}_{b}}={{I}_{e}}-{{I}_{c}}=10.53-10 $

$ {{I}_{b}}=0.53mA $

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