7️⃣ A lamp can work on a 50 volt mains taking 2 amps.What value of the resistance must be connected in series with it so that it can be operated from 200 volt mains giving the same power.
Answers
Answered by
43
SOLUTION
✷ Given:-
→ V = 50 V
→ I = 2 A
✷ Using formula:-
→
→ 50 = 2(R)
→ R = 25 ohm
→ P = V²/R = 2500/25 = 100 W
→ P = 40000/R'
→ R' = 400 ohm
→ R' = R + R"
→ 400 = 25 + R"
→
Anonymous:
Perfect like a Pearl ✨
Answered by
21
Answer:-
The Resistance is 375 ohm.
Solution :-
V = 50 V
I = 2 A
V = IR
50 = 2×R
R = 50/2 ohm
R=25ohm
=>P = V²/R = 2500/25 = 100 W
=>P = 40000/R'
=>R' = 400 ohm
R' = R + R"
=>400 = 25 + R"
=>R" =400-25
=>R" = 375 ohm
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