Fibre optic cable

Name:

Date:

Class:

Quick Questions

Shade in the A or B circle for each question.

1. How does a fibre optic cable carry data?

A As electrical signals along copper wires

B As pulses of light along thin glass or plastic strands

2. Which statement about fibre optic cables is true?

A Electrical interference does not affect them

B Electrical interference slows them down a lot

3. Which type of cable is best for sending data very fast over long distances?

A Fibre optic cable

B Ordinary copper Ethernet cable

4. What is the signal inside a fibre optic cable made of?

A Pulses of electricity

B Pulses of light

5. Where is fibre optic cable used?

A In the internet backbone that links cities and countries

B Only inside a Bluetooth speaker

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
1fibre optic cable		AA fibre optic cable that runs all the way into a home or business to give very fast internet
2fibre to the premises (FTTP)		BA cable that sends data as pulses of light along thin strands of glass or plastic
3Fibre optic cable carries data as pulses of light instead of electricity along thin glass or plastic strands.		Cbackbone_link = "fibre" interference = False
4Fibre optic cables are not affected by electrical interference and are used for long, very fast links such as the internet backbone.		DFibre optic cable is very fast over long distances and is not affected by electrical interference, because it uses light.
5fibre optic cable = sends electrical signals along copper wires		EFibre optic cable does not use electricity or copper. It sends pulses of light along thin glass or plastic strands.
6fibre optic cable = slow, and stopped by electrical interference		Flight_pulse = 1 # light on light_pulse = 0 # light off

Definitions

fibre optic cable

Fill in the Blanks

Complete each line of code by filling in the missing parts.

medium = "light" print(______)

interference = False if ___ interference: print("Fibre data stays clear")

distance = 100 if distance _ 50: print("Use fibre")

_____("Fibre carries pulses of light")

cables = ["copper", "fibre"] for cable in ______: print(cable)

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A cable ← "fibre optic"

B carries ← "electric current"

C strand ← "thin glass"

Question 2

A cable ← "fibre optic"

B affectedByEMI ← TRUE

C use ← "internet backbone"

Question 3

A IF cable = "fibre optic" THEN

B signal ← "light pulses"

C speed ← "very slow"

D END IF

Question 4

A cable ← "fibre optic"

B signal ← "light pulses"

C strand ← "copper"

Question 5

A cable ← "fibre optic"

B signal ← "light pulses"

C speed ← "very high"

D use ← "Bluetooth pairing"

Answer Key

Fibre optic cable

Section A: Quick Questions

B — As pulses of light along thin glass or plastic strands

A — Electrical interference does not affect them

A — Fibre optic cable

B — Pulses of light

A — In the internet backbone that links cities and countries

Section B: Match the Pairs

fibre optic cable → A cable that sends data as pulses of light along thin strands of glass or plastic

fibre to the premises (FTTP) → A fibre optic cable that runs all the way into a home or business to give very fast internet

Fibre optic cable carries data as pulses of light instead of electricity along thin glass or plastic strands. → light_pulse = 1 # light on light_pulse = 0 # light off

Fibre optic cables are not affected by electrical interference and are used for long, very fast links such as the internet backbone. → backbone_link = "fibre" interference = False

fibre optic cable = sends electrical signals along copper wires → Fibre optic cable does not use electricity or copper. It sends pulses of light along thin glass or plastic strands.

fibre optic cable = slow, and stopped by electrical interference → Fibre optic cable is very fast over long distances and is not affected by electrical interference, because it uses light.

Section C: Definitions

fibre optic cable — A cable that carries data as pulses of light along thin glass or plastic strands, giving very fast transfer over long distances with no electrical interference.

Section D: Fill in the Blanks

medium = "light"
print(medium)

interference = False
if not interference:
    print("Fibre data stays clear")

distance = 100
if distance > 50:
    print("Use fibre")

print("Fibre carries pulses of light")

cables = ["copper", "fibre"]
for cable in cables:
    print(cable)

Section E: Spot the Error

B — A fibre optic cable carries data as pulses of light, not as electric current. Line 2 should be carries ← "pulses of light".

B — Fibre optic cables use light, so electrical interference does not affect them. Line 2 should set affectedByEMI to FALSE.

C — Fibre optic cables are known for very high speed. Line 3 should be speed ← "very high".

C — The strands inside a fibre optic cable are thin glass or plastic, not copper. Line 3 should be strand ← "glass or plastic".

D — Fibre optic cables are used for the internet backbone and fibre to the premises. Bluetooth is a short-range wireless link. Line 4 should be use ← "internet backbone".