Question

How different musical notes are produced in the instrument named Jal tarang.

Answer 1

Jal Tarang is actually the indian instrument  which is melodic percussion. It is composed of the  set of metal bowls or other wise ceramic.These bowls aee generally filled with water  and then bowls are played with the help of wooden beaters  striking on the edge of the bowls .Each hand have the beaters  or  the sticks of Japanese Bamboo.
There are different size of cups can be made  with the help of bronze or the porcelain but today the china  bowls are the popular one which used by the artists. Total average of around 16 cups are generally used these are placed in front of the artists  in a semicircle arrangement. 
Varying the volume of water in the cups can change the pitch of the sound moreover varying  number of cups also effect the melody.

Answer 2

The Jal Tarang or the "jalatharangam" is an Indian melodic percussion instrument. It consists of a set of ceramic or metal bowls filled with water and these bowls are played by striking the edge with wooden beaters or Japanese bamboo sticks, one in each hand.

Cups of varying sizes were made of either bronze or porcelain. However, nowadays only china bowls are preferred by the artists. Around sixteen cups are normally used.

Cups for Mandra Swar (notes of the lower octave) are large while those for Taar Swar (notes of higher octaves) are smaller in size. The bowls are usually arranged in a semi-circle in front of the player to reach them all easily.

Water is poured into these cups and the pitch is changed by adjusting the volume of water in the cup. The number of cups depends on the melody being played. The player softly hits the cups with a wooden stick on the border to get the sound.