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Question 1.P.50: In the following circuit the value of R required for the tra......

In the following circuit the value of R required for the transfer of maximum power through load resistance of 10 Ω is

(a) 5 Ω (b) 15 Ω (c) 10 Ω (d) 20 Ω

1.50
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Let the required resistance be R_x . Then

R_{ eq }=\frac{10 \times R_x}{10+R_x}

When R=5  \Omega, R_{ eq }=3.33  \Omega

P_{5  \Omega}=I_5^2 \times 3.33, I_5=\frac{20}{R_{ eq }+5}

I is maximum and power is maximum ≅ 50 W

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