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Basic Electronics

Total questions: 56

Worksheet time: 28mins

Name
Class
Date
1.
Current is measured in:
a)
Ohms
b)
Voltage
c)
Amperes
d)
Watts
2.

Which LED(s) will not glow?

a)

A

b)

B

c)

C

d)

B & C

3.

Pin number of "A" pin is

a)

3

b)

5

c)

10

d)

12

4.

Under normal conditions a diode conducts current when it is

a)

reverse-biased.

b)

forward-biased.

c)

avalanched.

d)

saturated.

5.

Which one is an NPN transistor?

a)
b)
c)
d)
6.

The gold color band refers to__________tolerance.

a)

+ / - 20%

b)

+ / - 10%

c)

+ / - 5%

d)

Zero

7.

What is the purpose of a variable resistor in a circuit?

a)

allow current flow

b)

control current flow

c)

to see the color

d)

allow heat to build up

8.

The current through each resistor when they are connected in series is

a)

different

b)

same

c)

can be both A and B

d)

decreasing

9.

What is the unit of measurement for Current?

a)

Volts

b)

Amperes

c)

Watts

d)

Ohms

10.

A 5 Ω and a 10 Ω resistor are connected in a series circuit. The total resistance is equal to

a)

10 Ω

b)

50 Ω

c)

15 Ω

d)

20 Ω

11.

Two 10 Ω resistors are connected in parallel, their equivalent resistance is

a)

5 Ω

b)

0.2 Ω

c)

15 Ω

d)

20 Ω

12.

In series, if one bulb goes out, others will

a)

stay on

b)

also turn off

c)

blow up

d)

heat up

13.

The forward voltage drop across a silicon diode is about…….

a)

2.5 V

b)

3 V

c)

10 V

d)

0.7 V

14.

The positive lead of a diode is the cathode.

a)

TRUE

b)

FALSE

15.

When all parts of the circuit are connected it is a ______ circuit.

a)

Open

b)

Closed

16.

Identify the Symbol

a)

Breadboard

b)

LED

c)

Series circuit

d)

Diode

17.

Identify the Symbol

a)

Breadboard

b)

LED

c)

Series circuit

d)

Diode

18.

Which leg of the LED is the positive side?

a)

The longer one

b)

The shorter one

c)

There is no positive side

d)

They are both positive, I'm positive of it.

19.

A material's opposition to the flow of electric current is called

a)

Electricity

b)

Resistance

c)

Ground

d)

Capacitor

20.

Identify the Circuit as

a)

Parallel circuit

b)

Combined circuit

c)

Series circuit

d)

nothing connects them

21.

A resistor's first three colour bands are brown, black, and red. What is its value?

a)

10 ohms

b)

10 Kohms

c)

200 ohms

d)

1000 ohms

22.

Which digit does the color yellow denote on a resistor color band?

a)

3

b)

2

c)

4

d)

7

23.

Which of these colors is NOT used in the resistor value color code?

a)

white

b)

black

c)

violet

d)

pink

24.

What is the unit of measurement for resistance?

a)

Volts

b)

Amperes

c)

Watts

d)

Ohms

25.

What is the unit of measure for a capacitor?

a)

Ohms

b)

Volts

c)

Wattage

d)

Farad

26.

What electronic component is a one way valve for current?

a)

Capacitor

b)

Resistor

c)

Diode

d)

Relay

27.

What electronic component is like a switch that can be turned on and off by a current applied to its base?

a)

Transistor

b)

Integrated Circuit

c)

Diode

d)

Relay

28.

What electronic component is like a transistor, but can control much higher current and is often used in amplifiers?

a)

Transistor

b)

Integrated Circuit

c)

Diode

d)

MOSFET

29.

What is the name of a variable resistor controlled by light?

a)

Transistor

b)

LDR

c)

Potentiometer

d)

Varistor

30.

What is the proper name for a variable resistor?

a)

Transistor

b)

Photo Resistor

c)

Potentiometer

d)

Varistor

31.

By installing this electronic component you can control the charge and discharge time of a capacitor.

a)

Capacitor

b)

Resistor

c)

Diode

d)

Relay

32.

Identify the pictured schematic symbol.

a)

SPDT Switch

b)

Electrolytic Capacitor

c)

MOSFET

d)

Light Emitting Diode

33.

A flip flop can store

a)

1 bit

b)

2 bits

c)

4 bits

d)

8 bits

34.

Ohm's Law is

a)

IR=V

b)

I=VR

c)

V=I/R

d)

VI=R

35.

LED is

a)

Light Enhancing Diode

b)

Light Emitting Diode

c)

Light Emitting Detector

d)

Light Enhancing Detector

36.

A small component that lights up

when current flows through it.

a)

Resistor

b)

Capacitor

c)

Circuit

d)

Light-emitting Diode

37.

You use it to control the voltages and the currents in your circuit.

a)

Capacitor

b)

LED

c)

Switch

d)

Resistor

38.

A transistor has three pins named base, collector, and ...?

a)

Emitter

b)

Transistor

c)

Transmitter

39.

Name this electrical component

a)

Capacitor

b)

Fixed Resistor

c)

Potentiometer

d)

Transistor

40.

What is the function of a transistor?

a)

A current amplifier

b)

A rectifier

c)

A power supply

d)

An adder device

41.

Name this electrical component

a)

Ceramic Disc Capacitor

b)

Fixed Resistor

c)

Potentiometer

d)

Electrolytic Capacitor

42.

Name this electrical component

a)

Electrolytic Capacitor

b)

Fixed Resistor

c)

Ceramic Disc Capacitor

d)

Diode

43.

Which electronic components can be polarized and non-polarized?

a)

Resistors

b)

Inductors

c)

Capacitors

d)

Transformers

44.

Name this electrical component

a)

Diode

b)

Fixed Resistor

c)

Transistor

d)

Light Dependent Resistor

45.

What is this symbol represent?

a)

Diode

b)

Fixed Resistor

c)

Transistor

d)

Light Dependent Resistor

46.

What is the name of this?

a)

Relay

b)

Variable Capacitor

c)

Rheostat

d)

Variable Resistor

47.
What is the number value for green in the color code chart?
a)
6
b)
4
c)
2
d)
5
48.
Which type of switch doesn't have the same schematic symbol as the other 3?
a)
Push Button Switch
b)
Toggle Switch
c)
Slide Switch
d)
Rocker Switch
49.
Electrons have a positive charge.
a)
True
b)
False
50.

Which method of storing information in electronics uses coded numbers?

a)

Analog

b)

Digital

51.

Which mathematical equation explains the relationship between voltage, current and resistance within electrical circuits?

a)

Joule's Law

b)

Boyler's Law

c)

Ohm's Law

d)

Coulomb's Law

52.

A measure of how much work can be performed in a given amount of time.

a)

Resistance

b)

Current

c)

Voltage

d)

Power

53.

The measure of the degree to which a conductor opposes an electric current through that conductor.

a)

Voltage

b)

Current

c)

Resistance

d)

Power

54.

To use an LED, you need to connect it in a circuit with a...

a)

resistor

b)

capacitor

c)

transistor

d)

inductor

55.

Ampere

a)

A

b)

C

c)

DC

d)

Z

56.

Gain

a)

Increase in voltage, current and/or power.

b)

A charge that has more electrons than protons.

c)

Measured in ohms it is the total opposition to the flow of current offered by a circuit.

d)

Magnitude or size of a signal voltage or current.

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