Electronics quiz
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How do most TV remotes talk to the TV?
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More questions about Electronics
These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.
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Why are phone and computer contacts gold-plated?
Answer: Resists corrosion
Why: Gold ranks just third for conducting, behind silver and copper, but unlike them it does not oxidize or tarnish.
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What can a loudspeaker work as when run in reverse?
Answer: Microphone
Why: Sound pushing a speaker cone moves its coil through the magnet's field, which induces a small current, just as in a dynamic microphone.
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How many transistors did Intel's first microprocessor have?
Answer: 2,300
Why: The 4004 was first built to run a Japanese printing calculator, the Busicom 141-PF.
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Which element are most computer chips built from?
Answer: Silicon
Why: Silicon is the second most common element in Earth's crust after oxygen, over a quarter of its mass.
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Which LED color won its inventors a Nobel Prize?
Answer: Blue
Why: Red and green LEDs were decades old, but white LED lamps needed the blue LED that arrived in the early 1990s.
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Which battery type is known for the 'memory effect'?
Answer: Nickel-cadmium
Why: In nickel-cadmium cells, crystals can grow on the cadmium plate and hide part of it from the electrolyte, cutting capacity.
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