Light Bulbs

Which bulb is made with a semi-conductor that moves electrons to produce light?

• 
• 
• 

Which is the correct energy efficiency for the light bulbs (from least to greatest)?

• CFL - LED - incandescent

• incandescent - LED - CFL

• incandescent - CFL - LED

• LED - CFL - incandescent

Tags

NGSS.MS-ETS1-2

The bulb in a circuit glows when electric current

• flows through the glass covering

• flows through its filament

• stops flowing to the bulb

• flows into the air through the bulb

How high can the heat on incandescent light bulbs be?

• 25 °C

• 65 °C

• 100 °C

• More then 250 °C

Which gas is sometimes used in filament lamps ?

• argon

• oxygen

• Carbon dioxide

• Krypton

How many contacts are on the base of an incandescent light bulb?

• two

• one

• three

• four

Name the 4th no in the diagram

• glass

• support wire

• contact wire

• filament

Name the 1st no in the diagram

• glass

• support wire

• contact wire

• filament

This is the symbol of _____

• a switch

• a lightbulb

• a dry cell

• connecting wire

In which circuit the bulbs will light up brighter?

• X

• Y