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Transistor

Total questions: 15

Worksheet time: 12mins

Name
Class
Date
1.

What are the 3 legs of a transistor called?

a)

Base, Electrode, Commiter

b)

Bridge, Collector, Extruder

c)

Base, Collector, Emitter

d)

Brake, Collection, Emit

2.

A transistor is essentially what?

a)

An output device

b)

An electronic switch

c)

A deivce that limits the flow of power

3.

Transistors act like tiny "____________."

a)

Electron sources

b)

Switches

c)

Batteries

d)

Bees?

4.

transistor has 3 electrodes namely

a)

PNP

b)

NPN

c)

Base/ Collector/ Emitter

d)

Drain/ Gate/ Source

5.

In a Transistor ………………..

a)

IE = IC + IB

b)

IC = IE + IB

c)

IE = IC – IB

d)

IB = IC + IE

6.

In which circuit does the bulb light up?

a)
b)
c)
d)
7.

What are the names of the terminals X, Y and Z?

a)

X = Base, Y = Collector, Z = Emitter

b)

X = Emitter, Y = Base, Z = Collector

c)

X = Collector, Y = Base, Z = Emitter

d)

X = Collector, Y = Emitter, Z = Base

8.

Diagram shows a light controlled switch. The alarm will be activated when

a)

the surrounding is dark

b)

the surrounding is bright

c)

the temperature of the surrounding is high

d)

the temperature of the surrounding is low

9.

One function of the transistor is to_____________?

a)

rectify

b)

amplify

c)

limit

d)

control

10.
Emits light when a current passes through it
a)
fuse
b)
diode
c)
LED
d)
resistor
11.

How many terminals are there in a transistor....?

a)

1

b)

2

c)

3

d)

4

12.

Diagram shows an automatic switch circuit to light up a bulb during the day time. What changes should be done to light up the bulb at night?

Rajah menunjukkan litar suis automatik untuk menyalakan lampu semasa hari siang. Apakah perubahan yang perlu dilakukan untuk menyala mentol pada waktu malam?

a)

Interchange R1 and R3

Tukar R1 dan R3

b)

Reverse the terminal of the battery

Terbalikkan terminal bateri

c)

Replace the npn transistor with a pnp transistor

Gantikan transistor npn dengan transistor pnp

d)

Interchange R1 and the LDR

Terbalikkan R1 dan LDR

13.

The street lights use electronic control system that switches the lights on when the surrounding is dark. What is the input sensor of the control system?


Lampu jalan menggunakan sistem kawalan elektronik yang menghidupkan lampu ketika sekitarnya gelap. Apakah sensor input sistem kawalan?

a)

Thermistor

Termistor

b)

Light emitting diode

Diod pemancar cahaya

c)

Microphone

Mikrofon

d)

Light dependent resistor

Perintang peka cahaya

14.

Diagram shows a transistor circuit with a thermistor and a light bulb.

What happens to the resistance of the thermistor and the light bulb when the temperature of the surrounding is at room temperature?


Rajah menunjukkan suatu litar transistor dengan sebuah termistor dan mentol.

Apakah yang berlaku kepada rintangan termistor dan mentol itu apabila suhu sekeliling adalah pada suhu bilik?

a)

Resistance of thermistor low and lights up

Rintangan termistor rendah dan menyala

b)

Resistance of thermistor low and lights up

Rintangan termistor rendah dan tidak menyala

c)

Resistance of thermistor low and lights up

Rintangan termistor tinggi dan menyala

d)

Resistance of thermistor low and lights up

Rintangan termistor tinggi dan tidak menyala

15.

Diagram shows an automatic circuit using transistor. The resistance of thermistor decrease as the surronding temperature rises. The bell will ring when the potential difference across the resistor R is 4V. What is resistance of the thermistor?


Rintangan termistor berkurang jika suhu persekitaran bertambah. Loceng akan berbunyi apabila beza keupayaan merentasi R adalah 4V. Berapakah nilai rintangan resistor?

a)

4 kΩ

b)

5 kΩ

c)

10 kΩ

d)

16 kΩ