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Upsc prelims MCQ

With reference to piezoelectric effect, which of the following statements is NOT correct?

Anonymous Quiz

It is ability of materials to generate electric charge in response to applied mechanical stress.

The piezoelectric effect is an irreversible process.

They occur both naturally and are also manmade.

It forms the basis for a number of scientific instrumental techniques with atomic resolution.

366 answered

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Date: 2025-06-14| telegram

Telegram auto-delete message, expiring invites, and more

elegram is updating its messaging app with options for auto-deleting messages, expiring invite links, and new unlimited groups, the company shared in a blog post. Much like Signal, Telegram received a burst of new users in the confusion over WhatsApp’s privacy policy and now the company is adopting features that were already part of its competitors’ apps, features which offer more security and privacy. Auto-deleting messages were already possible in Telegram’s encrypted Secret Chats, but this new update for iOS and Android adds the option to make messages disappear in any kind of chat. Auto-delete can be enabled inside of chats, and set to delete either 24 hours or seven days after messages are sent. Auto-delete won’t remove every message though; if a message was sent before the feature was turned on, it’ll stick around. Telegram’s competitors have had similar features: WhatsApp introduced a feature in 2020 and Signal has had disappearing messages since at least 2016.

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