Question

an electric bulb is connected to a source what happened to the resistance of the circuit if another bulb is connected in a) series and b) parallel with first bulb?

Answer 1

$\huge \purple {answer}$

❤️When two bulbs have same power, then their resistance is also same. When second bulb connected in parallel to first bulb is switched on, the effective resistance of circuit becomes half and current in circuit becomes double. Due to it, this double current divides itself equally in two bulbs

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Answer 2

As ʙᴜʟʙs ᴀʀᴇ ᴀᴅᴅᴇᴅ ᴛʜᴇ ʀᴇsɪsᴛᴀɴᴄᴇ ɪɴ ᴛʜᴇ ᴄɪʀᴄᴜɪᴛ ᴅᴇᴄʀᴇᴀsᴇs sɪɴᴄᴇ ᴇᴀᴄʜ ᴄɪʀᴄᴜɪᴛ ɪs ᴀɴᴏᴛʜᴇʀ ᴘᴀᴛʜᴡᴀʏ ғᴏʀ ᴇʟᴇᴄᴛʀᴏɴs ᴛᴏ ᴍᴏᴠᴇ ғʀᴏᴍ ᴏɴᴇ ᴇɴᴅ ᴏғ ᴛʜᴇ ᴄɪʀᴄᴜɪᴛ ᴛᴏ ᴛʜᴇ ᴏᴛʜᴇʀ. sᴇʀɪᴇs ᴀɴᴅ ᴛʜᴇ ʙᴜʟʙs ɪɴ ᴘᴀʀᴀʟʟᴇʟ. Tᴏ ɢᴇᴛ ᴛʜᴇ ʟᴇᴀsᴛ ʟɪɢʜᴛ ғʀᴏᴍ ᴛᴡᴏ ᴄᴇʟʟs ᴀɴᴅ ᴛᴡᴏ ʙᴜʟʙs ʏᴏᴜ ᴡᴏᴜʟᴅ ᴄᴏɴɴᴇᴄᴛ ᴛʜᴇ ᴄᴇʟʟs ɪɴ ᴘᴀʀᴀʟʟᴇʟ ᴀɴᴅ ᴛʜᴇ ʙᴜʟʙs ɪɴ sᴇʀɪᴇs.