Ipad vibrate while charging
I have the Ipad air 4. While i charge my ipad it vibrates a bit for first 5 minutes of the charge and after that it gets normal.It vibrates at the back of my Ipad. Is this normal for an Ipad.
Audible noises from an iPad do not normally coincide with charging. The symptoms that you describe may (and I must stress, may) be attributable to the iPad Power Converter - this being an internal component of the iPad that uses high-frequency switching. Whilst unusual, it is not unknown for these electronic components to become audibly noisy.
If you are able, try substituting your iPad Power Adapter - and test charging. Substitution may make no difference - but if it does, then the problem can perhaps be attributed to a defective Power Adapter.
If you have any concerns, you would be best advised to take your iPad and Power Adapter along to the Genius Bar at your local Apple Store - where the technicians will be able to test and assess your iPad for a fault. You might consider making a reservation for your visit.