A heater of resistance 5 Ω carries a current of 3 A. How much heat does it release in 60 s?
Answer and explanation
Correct answer: D. 2700 J
- Step 1: Joule heating .
- Step 2: J.
Answer
2700 J.
Why not the others: 900 J: the current is not squared. 45 J: the time is converted to minutes. 540 J: the resistance is left out.
Practise more Electricity and Magnetism.
Free questions with an explanation for every one, and full timed EJU Japan mock tests.
More Electricity and Magnetism questions
- A 10 μF capacitor is charged to 12 V. How much charge does it store?
- A 5 μF capacitor is charged to 12 V. How much energy does it store?
- A 10 μF capacitor is charged to 6 V. How much charge does it store?
- A 10 μF capacitor is charged to 100 V. How much charge does it store?
- A 4 μF capacitor is charged to 6 V. How much energy does it store?
- A 5 μF capacitor is charged to 6 V. How much charge does it store?