A tungsten filament is operated at ___

Question 1 / 270707wfOzH7DoUbwF56L4pqQ

Question 1 of 270707wfOzH7DoUbwF56L4pqQ

A tungsten filament is operated at ____ temperature than a thoriated tungsten filament:

Back

Question 1 of 27070

Q

A tungsten filament is operated at ____ temperature than a thoriated tungsten filament:

🔍 Key Concepts

• Tungsten filament characteristics in vacuum tubes or lamps • Effect of thoriation (adding thorium) on electron emission • Relationship between operating temperature and electron emission efficiency

💭 Think About

• Think about why engineers add thorium to a tungsten filament. What property are they trying to improve? • If thorium improves electron emission, does that mean you need a hotter filament, a cooler filament, or does it not matter? • How does changing the required temperature affect filament life and power consumption?

✅ Before You Answer

• Recall that thoriated tungsten has a different work function than pure tungsten • Decide whether better emission at a given temperature would allow operation at a higher, lower, or same temperature for the same current output • Eliminate any option that contradicts what you know about filament life vs. temperature (hotter filaments generally have shorter life)

Question 1 of 27070

Q

A tungsten filament is operated at ____ temperature than a thoriated tungsten filament:

A

A higher

B

A lower

C

The same

D

Unknown

Question 1 / 270707wfOzH7DoUbwF56L4pqQ

Question 1 of 270707wfOzH7DoUbwF56L4pqQ

A tungsten filament is operated at ____ temperature than a thoriated tungsten filament:

Back

Question 1 of 27070

Q

A tungsten filament is operated at ____ temperature than a thoriated tungsten filament:

🔍 Key Concepts

• Tungsten filament characteristics in vacuum tubes or lamps • Effect of thoriation (adding thorium) on electron emission • Relationship between operating temperature and electron emission efficiency

💭 Think About

• Think about why engineers add thorium to a tungsten filament. What property are they trying to improve? • If thorium improves electron emission, does that mean you need a hotter filament, a cooler filament, or does it not matter? • How does changing the required temperature affect filament life and power consumption?

✅ Before You Answer

• Recall that thoriated tungsten has a different work function than pure tungsten • Decide whether better emission at a given temperature would allow operation at a higher, lower, or same temperature for the same current output • Eliminate any option that contradicts what you know about filament life vs. temperature (hotter filaments generally have shorter life)