Electricity Basics: Bulbs, LEDs & Cells

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Grade 6 quiz on bulbs, LEDs, and cells.

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shada haris

Emiratos Árabes Unidos

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Electricity Basics: Bulbs, LEDs & Cells


Electricity Basics: Bulbs, LEDs & CellsVersión en línea Grade 6 quiz on bulbs, LEDs, and cells. por shada haris 1 Which part of a bulb glows when electricity passes through? a Base metal b Glass shell c Filament d Support wire 2 LEDs are different from bulbs mainly because LEDs: a Need more current to glow b Cannot be used in circuits c Are always dimmer d Convert electricity directly to light with high efficiency 3 Which is a safe practice when handling bulbs and LEDs? a Plug into a mains outlet directly b Use bare wires to test c Use the correct voltage and avoid touching live wires d Mix up LED colors 4 Which statement is true about electric cells? a They cannot power LEDs b They convert light energy to sound c They store chemical energy and release electrical energy d They produce mechanical energy only 5 What energy does a bulb convert electrical energy into? a Electrical energy (no change) b Light energy and heat energy c Sound energy d Chemical energy 6 What happens if the filament in a bulb breaks? a It becomes a fused bulb and stops emitting light b It reverses polarity c It glows brighter d It cools down 7 An LED allows current to flow in which direction? a From negative to positive b Only from the positive to the negative terminal c In both directions d It doesn't conduct electricity 8 Approximately how many hours do LEDs last? a About 100,000 hours b About 10,000 hours c About 1,000 hours d About 1,000,000 hours 9 What is a set of electric cells called? a A battery b A circuit c A power pack d A capacitor 10 Why should you never open an electric cell? a It would start a fire instantly b It would stop working c The chemicals inside are harmful d It would short circuit 11 In a bulb, what is the thin wire inside called? a Coil b Anode c Cathode d Filament 12 Which gas fills the bulb to protect the filament? a Nitrogen b Oxygen c Carbon dioxide d Argon gas 13 What energy does a bulb primarily produce besides light? a Heat energy b Mechanical energy c Chemical energy d Radioactive energy 14 Which LED lead is the positive terminal? a The longer lead b The flat side c The round side d The shorter lead

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Electricity Basics: Bulbs, LEDs & Cells

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Electricity Basics: Bulbs, LEDs & CellsVersión en línea

por shada haris

Which part of a bulb glows when electricity passes through?

LEDs are different from bulbs mainly because LEDs:

Which is a safe practice when handling bulbs and LEDs?

Which statement is true about electric cells?

What energy does a bulb convert electrical energy into?

What happens if the filament in a bulb breaks?

An LED allows current to flow in which direction?

Approximately how many hours do LEDs last?

What is a set of electric cells called?

Why should you never open an electric cell?

In a bulb, what is the thin wire inside called?

Which gas fills the bulb to protect the filament?

What energy does a bulb primarily produce besides light?

Which LED lead is the positive terminal?