A very thin copper plate is electro`-` plated with gold using gold chloride in `HCl`. The current was passed for `20 mi n`. And the increase in the weight of the plate was found to be `2g.[Au=197]`. The current passed was `-`

The electrolytic bath used in gold plating of copper articles contains :

An insulator plate is passed between the plates of a capacitor. Then current .

An insulator plate is passed between the plates of a capacitor. Then current .

A constant current was passed through a solution of AuCl_(4)^(c-) ion between gold electrodes. After a period of 10.0 mi n , the increase in the weight of cathode was 1.314g . The total charge passed through solution is ( atomic weight of AuCl_(4)^(c-)=339)

A constant current was passed through a solution of AuCl_(4)^(c-) ion between gold electrodes. After a period of 10.0 mi n , the increase in the weight of cathode was 1.314g . The total charge passed through solution is ( atomic weight of AuCl_(4)^(c-)=339)

The amplification factor of a triode is 50. If the grid potential is decreased by 0.20 V, what increase, in plate potential will keep the plate current unchanged ?