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Question 1 of 5
1. Question
4 pointsTwo heating coils of resistances 10 Ω and 20 Ω are connected in parallel and connected to a battery of emf 10 V and internal resistance 1 Ω. The power consumed by them are in the ratio [Karnataka CET 2016]
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Question 2 of 5
2. Question
4 pointsIn a large building, there are 15 bulbs of 40 W, 5 bulbs of 100 W, 5 fans of 80 W and 1 heater of 1 kW. The voltage of the electric mains is 220 V. The minimum capacity of the main fuse of the building will be : [JEE Main 2014]
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Question 3 of 5
3. Question
4 pointsThe resistance of hot tungsten filament is about 10 times the cold resistance. What will be the resistance of 100 W and 200 V lamp when not in use? [AIEEE 2005]
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Question 4 of 5
4. Question
4 pointsA heater coil is cut into two equal parts and only one part is now used in the heater. The heat generated will now be [AIEEE 2005]
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Question 5 of 5
5. Question
4 pointsThe thermo emf of a thermocouple varies with the temperature θ of the hot junction as E = aθ + bq2 (in volts) where the ratio a/b is 700°C. If the cold junction is kept at 0°C, then the neutral temperature of the thermocouple is: [AIEEE 2004]
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