Supply chain challenges (lithium, cobalt) in EV Technology - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the sentence to identify a key metal used in electric vehicle batteries.

EV Technology

Electric vehicle batteries commonly use [1] as a critical metal.

Drag options to blanks, or click blank then click option'

Aaluminum

Bcopper

Ccobalt

Diron

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing metals that are common but not key for EV batteries like copper or iron.

Cobalt is a key metal used in electric vehicle batteries to improve energy density and stability.

2fill in blank

medium

Complete the sentence to name a major challenge in lithium supply.

EV Technology

One major challenge in lithium supply is [1] due to limited mining locations.

Drag options to blanks, or click blank then click option'

Ascarcity

Boverproduction

Cexcess demand

Drecycling

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing scarcity with overproduction or recycling.

Scarcity refers to the limited availability of lithium in accessible mining locations, which challenges supply.

3fill in blank

hard

Fix the error in the statement about cobalt supply risks.

EV Technology

Cobalt supply risks include [1] due to ethical concerns in mining regions.

Drag options to blanks, or click blank then click option'

Aoversupply

Bgeopolitical instability

Clow demand

Dtechnological redundancy

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing oversupply or low demand which do not match supply risk context.

Geopolitical instability in cobalt mining regions creates supply risks and ethical concerns.

4fill in blank

hard

Fill both blanks to describe a supply chain challenge and a solution.

EV Technology

The [1] of lithium and cobalt causes delays, but [2] efforts aim to improve sustainability.

Drag options to blanks, or click blank then click option'

Ascarcity

Brecycling

Cautomation

Doversupply

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up scarcity with oversupply or confusing recycling with automation.

Scarcity of lithium and cobalt causes supply delays, while recycling efforts help improve sustainability.

5fill in blank

hard

Fill all three blanks to complete the statement about supply chain challenges and responses.

EV Technology

Due to [1], cobalt prices [2] sharply, prompting [3] to seek alternative materials.

Drag options to blanks, or click blank then click option'

Ageopolitical instability

Brise

Cmanufacturers

Doversupply

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing oversupply instead of instability or confusing who responds to price changes.

Geopolitical instability causes cobalt prices to rise sharply, leading manufacturers to look for alternatives.

Practice

1. Why are lithium and cobalt important for electric vehicles?

easy

A. They are key metals used in electric vehicle batteries.

B. They are used to build the car's frame.

C. They power the electric motor directly.

D. They are used as fuel in electric vehicles.

Solution

1. Step 1: Understand the role of lithium and cobalt

   Lithium and cobalt are metals essential for making batteries, which store energy in electric vehicles.

2. Step 2: Identify their specific use

   They are not used for the car frame, motor, or as fuel, but specifically in battery cells.

3. Final Answer:

   They are key metals used in electric vehicle batteries. -> Option A

4. Quick Check:

   Battery metals = Lithium and cobalt [OK]

Hint: Remember: lithium and cobalt are battery metals [OK]

Common Mistakes:

• Thinking lithium powers the motor directly
• Confusing metals with fuel
• Assuming metals build the car frame

2. Which of the following correctly describes a supply chain challenge for lithium and cobalt?

easy

A. They are abundant and easy to mine everywhere.

B. They can be replaced easily with common metals.

C. They are not needed for electric vehicle batteries.

D. Mining is limited to certain countries, causing supply risks.

Solution

1. Step 1: Identify mining locations

   Lithium and cobalt mining is concentrated in a few countries, making supply vulnerable to disruptions.

2. Step 2: Evaluate options

   Options A, B, and D are incorrect because these metals are not abundant everywhere, not easily replaced, and are essential for batteries.

3. Final Answer:

   Mining is limited to certain countries, causing supply risks. -> Option D

4. Quick Check:

   Limited mining locations = supply risk [OK]

Hint: Supply risk comes from limited mining locations [OK]

Common Mistakes:

• Assuming metals are abundant everywhere
• Thinking metals can be replaced easily
• Ignoring their importance in batteries

3. Consider this code snippet representing supply data:

lithium_supply = 1000
cobalt_supply = 500
required_lithium = 1200
required_cobalt = 400

if lithium_supply < required_lithium:
    lithium_status = "Shortage"
else:
    lithium_status = "Sufficient"

if cobalt_supply < required_cobalt:
    cobalt_status = "Shortage"
else:
    cobalt_status = "Sufficient"

print(lithium_status, cobalt_status)

What will be the output?

medium

A. Shortage Sufficient

B. Sufficient Shortage

C. Shortage Shortage

D. Sufficient Sufficient

Solution

1. Step 1: Compare lithium supply and requirement

   Lithium supply is 1000, required is 1200, so supply < required means lithium_status = "Shortage".

2. Step 2: Compare cobalt supply and requirement

   Cobalt supply is 500, required is 400, so supply >= required means cobalt_status = "Sufficient".

3. Final Answer:

   Shortage Sufficient -> Option A

4. Quick Check:

   1000 < 1200 = Shortage, 500 >= 400 = Sufficient [OK]

Hint: Check supply vs requirement for each metal [OK]

Common Mistakes:

• Mixing up less than and greater than signs
• Confusing lithium and cobalt variables
• Assuming both are shortages

4. This code tries to check cobalt supply but has an error:

cobalt_supply = 300
required_cobalt = 400

if cobalt_supply > required_cobalt:
    status = "Sufficient"
else
    status = "Shortage"

print(status)

What is the error and how to fix it?

medium

A. Print statement missing parentheses; add parentheses

B. Missing colon after else; add ':' after else

C. Variable name typo; change cobalt_supply to cobalt_supplyd

D. Wrong comparison operator; change > to <

Solution

1. Step 1: Identify syntax error in if-else

   The else statement is missing a colon ':' at the end, which is required in Python syntax.

2. Step 2: Correct the syntax

   Add a colon ':' after else to fix the error.

3. Final Answer:

   Missing colon after else; add ':' after else -> Option B

4. Quick Check:

   Python requires ':' after else [OK]

Hint: Check for missing colons after else [OK]

Common Mistakes:

• Ignoring missing colon syntax error
• Changing comparison operator unnecessarily
• Assuming variable name typo

5. A company wants to estimate how cobalt shortages affect electric vehicle production. If each vehicle needs 20 kg of cobalt and the supply is 5000 kg, how many vehicles can be made? What happens if demand is for 300 vehicles?

hard

A. 500 vehicles can be made; supply exceeds demand

B. 300 vehicles can be made; supply meets demand exactly

C. 250 vehicles can be made; demand of 300 causes shortage

D. 20 vehicles can be made; supply is very low

Solution

1. Step 1: Calculate maximum vehicles from cobalt supply

   Divide total cobalt supply by cobalt per vehicle: 5000 kg / 20 kg = 250 vehicles.

2. Step 2: Compare production capacity with demand

   Demand is 300 vehicles, which is more than 250 possible, so there is a shortage.

3. Final Answer:

   250 vehicles can be made; demand of 300 causes shortage -> Option C

4. Quick Check:

   5000/20=250 < 300 demand = shortage [OK]

Hint: Divide supply by per vehicle need, compare with demand [OK]

Common Mistakes:

• Multiplying instead of dividing supply by per vehicle need
• Assuming supply meets demand without calculation
• Confusing kg with number of vehicles