When we say charge is conserved, we mean that charge can view available hint(s) when we say charge is conserved, we mean that charge can be saved, like money in a bank take equivalent forms only be transferred from one place to another be created or destroyed, as in nuclear reactions

neither be created nor destroyed

Explanation:

When we say charge is conserved, we mean that charge can neither be created nor be destroyed similar to energy concept.

When any physical quantity is conserved it always means that its quantity was, is and will remain the same throughout the eternity. It can neither be created nor be destroyed but it can change from one form to another.

sonar - device which is used to find the submit submarines, sankalp ship. sonar waves consists of a transmitter and detector which are installed in the observation centre on board of a ship. the ultrasonic waves are sent into the sea at high frequency about 1000 khz in all direction.