anyone can help me in physics class 12th??A lamp consumes 500 J of electrical energy in 20 seconds. What is the power of the lamp?
Also find the electrical energy consumed in units if the lamp operates for 2 hours daily for 15 days.
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anyone can help me in physics class 12th??A lamp consumes 500 J of electrical energy in 20 seconds. What is the power of the lamp?
Also find the electrical energy consumed in units if the lamp operates for 2 hours daily for 15 days.
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Verified answer
Answer:
Explanation:
Given:-
To Find:-
Solution:-
Energy Consumes by a body is defined as the product of power of appliances & time taken.
• E = P× t
Substitute the value we are
→ 500 = P × 20
→ P = 500/20
→ P = 50/2
→ P = 25 watt.
Now, we have to calculate the energy consumed by lamp which operates for 2 hour daily for 15 days.
• E = P× t
Substitute the value we get
→ E = 25 × (2 × 15)
→ E = 25 × 30
→ E = 500 J
As we know that 1 Unit or kWh = 3.6×10⁶ J
Therefore, 500 J = 500/3.6×10⁶
→ 500×10⁻⁶ /3.6 unit
→ 138 × 10⁻⁶ unit
→ 1.38 × 10⁻⁴ Unit
Explanation:
To find:- We have to find the power of the lamp, P ?
___________________
Here:-
● E is for energy consumed.
● P is for power.
● t is for time taken.
___________________
Hence:-
____________________
___________________
☯️ 1 unit or kWh = 3.6 × 10⁶ J.
Hence:-