Formative 1.2 Contact Points and Light Bulbs
Authored by Mike Hall
Physics
9th - 12th Grade
Used 1+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of removing air from an incandescent bulb?
To increase brightness
To prevent the tungsten from oxidizing
To reduce heat
To lower cost
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of the glass envelope in a light bulb?
To conduct electricity
To protect the filament
To provide insulation
To increase brightness
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the function of support wires in a light bulb?
To conduct electricity
To provide structural support
To increase brightness
To reduce heat
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of the black-colored epoxy in some bulbs?
To conduct electricity
To separate contact points
To increase brightness
To reduce heat
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of phosphor in a fluorescent bulb?
To emit UV light
To absorb UV light and emit visible light
To conduct electricity
To provide structural support
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What did Warren De La Rue use in his first attempt to produce an incandescent bulb?
Carbonized bamboo
Platinum coil
Charcoal filament
Gallium arsenide
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What did Heinrich Gobel use to secure a carbonized bamboo filament in an incandescent lamp?
Glass container
Platinum wires
Charcoal strips
Silicon casing
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