Question

In the arrangement shown in figure there are two coils wound on a non-
conducting cylindrical rod. Initially the key is not inserted in the circuit. Later
the key is inserted and then removed shortly after.
Coil
Coil !!
K
HHHO
What are the two observations that can be noted from the galvanomet
reading?​

Answer 1

Answer:

, two coils are not electrically connected to each other because they are wound on a non conducting rod. Say Coil-1 is connected across a battery through a key. This coil is called primary coil. Coil-2 is connected across a galvanometer. This coil is called secondary coil. 

Answer 2

Answer:

ᴛʜᴇʀᴇ ᴀʀᴇ ᴍᴏᴍᴇɴᴛᴀʀʏ ɢᴀʟᴠᴀɴᴏᴍᴇᴛᴇʀ ᴅᴇғʟᴇᴄᴛɪᴏɴs ᴛʜᴀᴛ ᴅɪᴇ ᴏᴜᴛ sʜᴏʀᴛʟʏ; ᴛʜᴇ ᴅᴇғʟᴇᴄᴛɪᴏɴs ᴀʀᴇ ɪɴ ᴏᴘᴘᴏsɪᴛᴇ ᴅɪʀᴇᴄᴛɪᴏɴs.