Sometimes my hand is shaking , when i hold it at some angle. and some times i hear beep noise suddenly in my ears. plz tell me why it's happening?

See your physician: There are many possible causes for the postural tremor including medications, age, caffeine, stress, essential tremor, and Parkinson's disease to name a few. See your primary care physician to have your tremors and sudden noises in the ear evaluated. If he/she is concerned, you may be referred to a neurologist. http://www.nlm.nih.gov/medlineplus/tremor.html