Achieve CUET (UG) Physics Practice Book>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>Exercise>Q 122

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The emitter current $I_{E}$ in a transistor is $3 mA$ . If the leakage current $I_{C} BO$ is $5 μA$ and $α = 0.98$ , calculate the collector and base current.

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Important Questions on Semiconductor Electronics: Materials, Devices and Simple Circuits

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Achieve CUET (UG) Physics Practice Book>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>Exercise>Q 123

A transistor has an

I_{C}

of

100 mA

and

I_{B}

of

0.5 mA

. What is the value of

a_{dc}

?

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Achieve CUET (UG) Physics Practice Book>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>Exercise>Q 124

The AC current gain in a common base configuration is______.

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Achieve CUET (UG) Physics Practice Book>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>Exercise>Q 125

A transistor has an

I_{E}

of

0.9 mA

and implication factor of

0.98

. What will be the

I_{C}

?

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Achieve CUET (UG) Physics Practice Book>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>Exercise>Q 126

In CB configuration, the value of

α = 0.98 A

. A voltage drop of

4.9 V

is obtained across the resistor of

5 KΩ

when connected in collector circuit. Find the base current

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Achieve CUET (UG) Physics Practice Book>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>Exercise>Q 127

The input signal given to a CE amplifier having a voltage gain of 150 is

V_{i} = 2 \cos (15 t + \frac{π}{3})

. The corresponding output signal will be:

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Achieve CUET (UG) Physics Practice Book>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>Exercise>Q 128

The specific characteristic of a common emitter amplifier is

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Achieve CUET (UG) Physics Practice Book>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>Exercise>Q 129

The input resistance of a silicon transistor is

100 Ω .

Base current is changed by

40 μ A,

which results in a change in collector current by

2 mA .

The transistor is used as common emitter amplifier with a load resistance of

4 k Ω .

The voltage gain of the amplifier is

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Achieve CUET (UG) Physics Practice Book>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>Exercise>Q 130

In a common emitter amplifier, when a signal of

40 mV

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

100 μA

and emitter current changes by

2.1 mA

. The trans-conductance is