A silver and a copper voltameter are connected in series with a `12.0 V` battery of negligible resistance. It is found that `0.806g` of silver is deposited in half an hour.Find (a) the mass of the copper deposited and (b) the energy supplied by the battery. `ECE` of silver `= 1.12 xx 10^(-6) kg C^(-1)` and that of copper `= 6.6 xx 10^(-7) kg C^(-1)`A. 64 WB. 32 WC. 96 WD. 16 W

A silver and a copper voltameter are connected in series with a `12.0

1.	A silver and a copper voltameter are connected in series with a `12.0 V` battery of negligible resistance. It is found that `0.806g` of silver is deposited in half an hour.Find (a) the mass of the copper deposited and (b) the energy supplied by the battery. `ECE` of silver `= 1.12 xx 10^(-6) kg C^(-1)` and that of copper `= 6.6 xx 10^(-7) kg C^(-1)`A. 64 WB. 32 WC. 96 WD. 16 W
Answer» Correct Answer - D

Discussion

No Comment Found

Related InterviewSolutions

For a thermocouple, the neutral temperature is `270^(@)C` and the temperature of its cold junction is `20^(@)C` . If there is no deflection in the galvanometer, the temperature of the hot junction should beA. `210^(@)C`B. `540^(@)C`C. `520^(@)C`D. `209^(@)C`
The neutral temperature of a thermocouple is `350^(@)C` when the cold junction is at . `0^(@)C` When the cold junction is immersed in a bath of `30^(@)C`, the inversion temperature isA. `700^(@)C`B. `600^(@)C`C. `35^(@)C`D. `670^(@)C`
For a thermocouple the neutral temperature is `270^(@)C` when its cold junction is at `20^(@)C` . What will be the neutral temperature and the temperature of inversion when the temperature of cold junction is increased to `40^(@)C`A. `290^(@)C, 580^(@)C`B. `270^(@)C, 580^(@)C`C. `270^(@)C, 500^(@)C`D. `290^(@)C, 540^(@)C`
A thermoelectric refrigerator works onA. Joule effectB. Seeback effectC. Peltier effectD. Thermonic emission
Consider the following statements regarding a thermocouple. (A) The neutral temperature does not depend on the temperature of the cold junction. (B) The inversion temperature does not depend on the temperature of the cold junction.A. IncreasesB. Approaches inversion temperatureC. DecreasesD. Remains the same
If a high power heater is connected to electric mains, then the bulbs in the house become dim, because there is aA. Current dropB. Potential dropC. No current dropD. No potential drop
Two bulbs, one of 50 watt and another of 25 watt are connected in series to the mains. The ratio of the currents through them isA. `2 : 1`B. `1 : 2`C. `1 : 1`D. Without voltage, cannot be calculated
4 bulbs marked 40 W , 250 V are connected in series with 250 V mains. The total power isA. 10 WB. 40 WC. 320 WD. 160 W
The current flowing through a lamp marked as 50 W and 250 V isA. 5 ampB. `2.5 amp`C. 2 ampD. `0.2 amp`
An electric lamp is marked 60 W , 230 V . The cost of a 1 kWh of energy is Rs . 1.25. The cost of using this lamp 8 hrs a day for 30 day isA. Rs. 10B. Rs. 16C. Rs. 18D. Rs. 20

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment