Question

Give two examples of electrification by
friction.
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Answer 1

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(1) When we remove our sweater in winter on a dry day, electric charges are produced by friction between the woollen sweater and our body. This produces crackling sound and the sweater appears to stick to our body.

(2) Electric charges develop on clouds due to friction. This results in thunder and lightning under suitable conditions.

(3) When a glass rod is rubbed with silk, both get charged due to friction

Answer 2

ᴇxᴀᴍᴘʟᴇs

ᴡʜᴇɴ ᴀ ɢʟᴀss ʀᴏᴅ ɪs ʀᴜʙʙᴇᴅ ᴡɪᴛʜ ᴀ sɪʟᴋ ᴄʟᴏᴛʜ, ɢʟᴀss ᴀᴄϙᴜɪʀᴇs ᴀ ᴘᴏsɪᴛɪᴠᴇ ᴄʜᴀʀɢᴇ ᴀɴᴅ sɪʟᴋ ᴄʟᴏᴛʜ ᴀᴄϙᴜɪʀᴇs ᴀ ɴᴇɢᴀᴛɪᴠᴇ ᴄʜᴀʀɢᴇ. ...

ᴡʜᴇɴ ᴀɴ ᴇʙᴏɴɪᴛᴇ ʀᴏᴅ ɪs ʀᴜʙʙᴇᴅ ᴡɪᴛʜ ғᴜʀ ᴄʟᴏᴛʜ, ᴇʙᴏɴɪᴛᴇ ʀᴏᴅ ᴀᴄϙᴜɪʀᴇs ᴀ ɴᴇɢᴀᴛɪᴠᴇ ᴄʜᴀʀɢᴇ ᴀɴᴅ ғᴜʀ ᴄʟᴏᴛʜ ᴀᴄϙᴜɪʀᴇs ᴀ ᴘᴏsɪᴛɪᴠᴇ ᴄʜᴀʀɢᴇ.