Physics, asked by Rohitkumar0153, 11 months ago

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 Anonymous
43

SOLUTION

Given:-

→ V = 50 V

→ I = 2 A

Using formula:-

\boxed{\sf{V = IR}}

→ 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"

\boxed{\sf{R" = 375 ohm}}


Anonymous: Perfect like a Pearl ✨
Answered by ıtʑFᴇᴇʟɓᴇãᴛ
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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