What are the failures of ohm's law?
Answers
- ᴏʜᴍs ʟᴀᴡ ғᴀɪʟs ᴛᴏ ᴇxᴘʟᴀɪɴ ᴛʜᴇ ʙᴇʜᴀᴠɪᴏᴜʀ ᴏғ sᴇᴍɪ ᴄᴏɴᴅᴜᴄᴛᴏʀ ᴅᴇᴠɪᴄᴇs ᴀɴᴅ ᴜɴɪʟᴀᴛᴇʀᴀʟ ᴅᴇᴠɪᴄᴇs sᴜᴄʜ ᴀs ᴅɪᴏᴅᴇs, ᴛʀᴀɴsɪsᴛᴏʀs ᴇᴛᴄ. ... ɪғ ᴛʜᴇ ᴘʜʏsɪᴄᴀʟ ᴄᴏɴᴅɪᴛɪᴏɴs sᴜᴄʜ ᴀs ᴛᴇᴍᴘᴇʀᴀᴛᴜʀᴇ ᴏʀ ᴘʀᴇssᴜʀᴇ ᴀʀᴇ ɴᴏᴛ ᴋᴇᴘᴛ ᴄᴏɴsᴛᴀɴᴛ (ᴏʀ ɴᴏᴛ ɪɴ ᴘʀᴏᴘᴇʀ ʀᴀɴɢᴇ) ᴛʜᴇɴ ᴏʜᴍs ʟᴀᴡ ᴍᴀʏ ɴᴏᴛ ɢɪᴠᴇ ᴇxᴘᴇᴄᴛᴇᴅ ʀᴇsᴜʟᴛs.
- hope its helps....dude
Answer:
This law cannot be applied to unilateral networks. A unilateral network has unilateral elements like , , etc., which do not have same voltage current relation for both directions of current.
Ohm’s law is also not applicable for non – linear elements. Non-linear elements are those which do not give current through it, is not exactly proportional to the voltage applied, that means the resistance value of those elements changes for different values of voltage and current. Examples of non – linear elements are thyristor, electric arc, etc.
It is only applicable for some conductors called Ohmic Conductors which have a linear dependency of potential difference on current flowintg through the conductor means V proportional to I . But there are many other conductors which do not follow Ohm's Law & are called as Non-Ohmic Conductors . Some off them are Transistors , Diodes ,etc.
Ohm's law fails because the graph between V and I is expected to be a straight line which is not obtained for higher values of current for Thyristors the relation between V and I is not unique as we obtain more than two values of I for the same V.Moreover,sometimes the relation of V and I becomes dependent on sign of V for forward and reverse bias respectively HOPE U FIND IT USEFUL WAITING FOR SOME INTERESTING VIEWS……..