MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Reverse Bias

In a transist...

Question

In a transistor circuit, when the base current is increased by 50 $μ A$ , keeping the collector voltage fixed at 2V, the collector current increases by 1 mA. The current gain of the transistor is

A

20

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

B

40

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

60

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

80

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A 20
Current gain $= (\frac{I_{C}}{I_{B}}) k e e p i n g V_{C E} = c o n s t a n t$

Given , $I_{C} = 1 m A, I_{B} = 50 μ A$

$\frac{I_{C}}{I_{B}} = 20$

Hence option $A$ is correct answer.

Suggest Corrections

thumbs-up

0

Similar questions

Q. In a transistor circuit, when the base current is increased by

50

μ A

, keeping collector voltage fixed at

2 V

, the collector current increases by

1.0 m A

. The current amplification factor of the transistor will be

Q. In a transistor circuit, the base current changes from

30

μ A

90

μ A

. If the current gain of the transistor is

30

, the change in the collector current is

Q. Why is the base region of the transistor thinly doped?
The input resistance of a transistor is

1000 Ω

. On changing the base current by

10 μ A

, the collector current increases by

2 m A

. If a load resistance of

5 k Ω

is used in the circuit, calculate (i) the current gain, (ii) voltage gain of the amplifier.

Q. A transistor is used in a common-emitter mode in an amplifier circuit. When a single input voltage of

20 mV

is added to the base emitter voltage, the base current changes by

20 μ A

and the collector current changes by

2 m A

. The load resistor is

5 k Ω

. What is the value of current gain

(β)

?

Q. For common emitter configuration of a transistor, the collector voltage

V_{c} = 2 V

and, base current changes from

100 μ A t o 200 μ A

, and collector current changes from 5 mA to 10 mA. The current gain is

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

PN Junction

PHYSICS

Watch in App

explore_more_icon

Explore more

Standard XII Physics

Join BYJU'S Learning Program

CrossIcon