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