Which outcome occurs in smoke detectors using Americium-241?

💡 Explanation

Alpha particles from Americium-241 decay ionize air creating a current; particle blockage triggers the alarm because reduced ionization decreases the current. Therefore the smoke detector activates, rather than an alternative emission or a fission process.

• Which outcome occurs when rapidly sublimating solid carbon dioxide cools electronics?
• Which limitation arises when designing ultra-high bypass turbofan engines?
• Which inherent limit restricts energy harvesting in pulsed fusion?
• Which mechanism limits electron conductivity in a partially filled molecular orbital within a nanowire?
• Which outcome occurs when volatile liquid refrigerant leaks into a mechanical refrigeration system vacuum pump?
• Which risk increases when a silicon ingot cools rapidly during Czochralski crystal growth?