Home
Class 12
PHYSICS
A transistor is used in CE mode in an am...

A transistor is used in CE mode in an amplifier circuit. When a signal of 40 mV is added to base-emitter voltage, the base current changes by `40 muA` and collector by 6mA. The load resistance is `10 kOmega` . Calculate
(i) The current gain `beta`
(ii) The input resistance `R_(BE)`

Text Solution

AI Generated Solution

To solve the problem, we need to calculate the current gain (β) and the input resistance (R_BE) of the transistor in the common emitter (CE) mode. ### Given Data: 1. Change in base-emitter voltage (ΔV_BE) = 40 mV = 40 x 10^-3 V 2. Change in base current (ΔI_B) = 40 μA = 40 x 10^-6 A 3. Change in collector current (ΔI_C) = 6 mA = 6 x 10^-3 A 4. Load resistance (R_L) = 10 kΩ = 10 x 10^3 Ω ...
Promotional Banner

Topper's Solved these Questions

  • SEMICONDUCTOR ELECTRONICS: MATERIALS, DEVICES AND SIMPLE CIRCUITS

    AAKASH INSTITUTE ENGLISH|Exercise Try yourself|20 Videos

  • SEMICONDUCTOR ELECTRONICS: MATERIALS, DEVICES AND SIMPLE CIRCUITS

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (Section -A (Objective Type question (One option is correct))|50 Videos

  • SEMICONDUCTOR ELECTRONICS (MATERIAL, DEVICES AND SIMPLE CIRUITS )

    AAKASH INSTITUTE ENGLISH|Exercise Assignment SECTION - D (Assertion & reason type Question)|10 Videos

  • SYSTEM OF PARTICLES AND ROTATIONAL MOTION

    AAKASH INSTITUTE ENGLISH|Exercise Try Yourself|63 Videos

Similar Questions

Explore conceptually related problems

A transistor is used in Common-emitter mode in an amplifier circuits. When a signal of 20 mV is added to the base-emitter voltage, the base current changes by 40 muA and the collector current changes by 2mA. The load resistance is 5 kOmega then the voltage gain is

A transistor is used in common-emitter mode in an amplifier circuit. When a signal 20mV is added to the base-emmiter voltage,the base current changes by 20(mu)A and the collector current changes by 2mA.The load resistance is 5k(Omega) .Calculate (a)the factor (beta) (b)the input resistance R_(BE), (c) the transconductance and (d) the voltage gain .

In a common emitter amplifier , when a signal of 40 mV is added to the input voltage, the base current changes by 100 muA and emitter current changes by 2.1mA the trans-conductance is

A transistor has a current gain of 30. If the collector resistance is 6kOmega , input resistance is 1kOmega , calculate its volage gain?

An NPN transistor is used in common emitter configuration as an amplifier with 1k Omega load resistance. Signal voltage of 10 mV is applied a across the base-emitter. This produces a 3 mA change in the collector current and 15 mu A change in the base currect of the amplifier. The input resistance and voltage gain are :

A p-n-p transistor is used in common-emitter mode in an amplifier circuuit. A change of 40muA in the base current brings a change of 2mA in collector current and 0.04V in base-emitter volatage. Find the (a) input resistance r_(i) and (b) the base current amplification factor (beta) . (c ) if a load of 6kOmega is used, then also find the voltage gain of the amplifier.

The current gain of transistor in a common emitter circuit is 40 . The ratio of emitter current to base current is.

The input resistance of a transistor is 1000 Omega on charging its base current by 10 muA , the collector current increases by 2 mA. If a load resistance of 5 kOmega is used in the circuit, the voltage gain of the amplifier is

A transistor is used as a common emitter amplifier with a load resistance of 2kOmega . The input resistance is 150Omega. Base current is changed by 20muA which results in change in collector current by 1.5 mA. The voltage gain of the amplifier is

In a common emitter transistor circuit, the base current is 40 muA , then V_(BE) is