The given diagram shows an electron gun of a hot cathode ray tube.
A 6 V dc source and a 1000 V dc source are available. To obtain a focused beam of fast moving electrons the 6 V and 1000 V sources should be utilized such that
Three electrolytic cells A,B,C containing solutions of ZnSO4, AgNO3 and CuSO4, respectively are connected in series. A steady current of 1.5 amperes was passed through them until 1.45 g of silver deposited at the cathode of cell B. How long did the current flow? What mass of copper and zinc were deposited?