Question

Which of the following has high resistance when it is cold ?

LDR

LED

Diode

Thermistor​

Answer 1

LDR

ɴᴏʀᴍᴀʟʟʏ ᴛʜᴇ ʀᴇsɪsᴛᴀɴᴄᴇ ᴏғ ᴀɴ ʟᴅʀ ɪs ᴠᴇʀʏ ʜɪɢʜ, sᴏᴍᴇᴛɪᴍᴇs ᴀs ʜɪɢʜ ᴀs 1000 000 ᴏʜᴍs, ʙᴜᴛ ᴡʜᴇɴ ᴛʜᴇʏ ᴀʀᴇ ɪʟʟᴜᴍɪɴᴀᴛᴇᴅ ᴡɪᴛʜ ʟɪɢʜᴛ ʀᴇsɪsᴛᴀɴᴄᴇ ᴅʀᴏᴘs ᴅʀᴀᴍᴀᴛɪᴄᴀʟʟʏ. ... ᴏᴘᴘᴏsɪᴛᴇ ɪs ᴀɴᴏᴛʜᴇʀ ᴇxᴀᴍᴘʟᴇ ᴏғ ᴀ ʟɪɢʜᴛ sᴇɴsᴏʀ ᴄɪʀᴄᴜɪᴛ : ᴡʜᴇɴ ᴛʜᴇ ʟɪɢʜᴛ ʟᴇᴠᴇʟ ɪs ʟᴏᴡ ᴛʜᴇ ʀᴇsɪsᴛᴀɴᴄᴇ ᴏғ ᴛʜᴇ ʟᴅʀ ɪs ʜɪɢʜ.

❍❍❍❖❍❍❍

Answer 2

Good Night bro.

Have you sweet dream