Question

How many calories of heat will be produced approximately in a 210 watt electric bulb in 5 minutes

• A. 80000 cal
• B. 63000 cal
• C. 1050 cal
• D. 15000 cal

Answer 1

Answer: (D)

15000 cal

Answer 2

$H = \frac{V^{2}t}{R \times J}Calories = \frac{Pt}{J} = \frac{210 \times 5 \times 60}{4.2} = 15000cal$