Free Printable Transistors Worksheet Extraction

Worksheets

Transistors Worksheet Extraction

Total questions: 10

Worksheet time: 5mins

Name

Class

Date

A transistor has $I_c = 150\ \text{mA}$ and $I_B = 0.75\ \text{mA}$ . What is the forward current gain of this transistor?

150

100

200

250

What is the forward current gain of this transistor?

150

100

200

250

In the transistor switch circuit shown, the base is initially connected to the 0 V rail. According to the description, what operating mode is the transistor in at this initial condition?

Cut-off

Saturation

Active (forward-active)

Breakdown

When the switch in the circuit is moved so that a current flows into the base, what happens according to the description of the circuit’s operation?

The transistor enters saturation and the LED lights

The transistor remains in cut-off and the LED stays off

The transistor goes into breakdown and the LED burns out

The transistor operates in reverse-active and the LED blinks

What is the stated purpose of choosing appropriate values for the two resistors in the transistor switch with an LED?

To limit currents and protect both the transistor and the diode

To maximize the LED brightness regardless of current

To ensure the base-emitter junction never conducts

To match the power supply’s internal resistance

In the modified switch that includes a light sensor, what happens to the photodiode’s resistance when light levels fall?

It increases

It decreases

It remains constant

It becomes negative

As the photodiode resistance increases in the light-sensitive switch, what is the described effect at point A and on the LED?

Voltage at A increases until the transistor activates and the LED lights

Voltage at A decreases, keeping the transistor off and the LED dark

Voltage at A oscillates, causing the LED to flicker

Voltage at A is clamped at 0 V and the LED cannot light

What adjustment does making $R_1$ a variable resistor allow in the light-sensitive switch circuit?

Adjusting the sensitivity of the circuit

Increasing the LED’s forward voltage

Reversing the photodiode polarity

Eliminating the need for $R_C$

According to the basic transistor circuit description, which of the following quantities define transistor operation? Select all that apply.

$V_{BE}$ (base-to-emitter voltage)

$V_{CE}$ (collector-to-emitter voltage)

$I_B$ (base current)

$I_C$ (collector current)

$V_{BC}$ (base-to-collector voltage)

10.

Match each named transistor characteristic to the variables it plots, as described.

Input characteristic

$I_B$ against $V_{BE}$

Transfer characteristic

$I_C$ against $I_B$

Output characteristic

$I_C$ against $V_{CE}$

Reset

Transistors Worksheet Extraction

Total questions: 10

Worksheet time: 5mins

Similar Resources on Wayground