Explanation:
R₃ and R₄ are in series. Their combined resistance is:
R₃₄ = R₃ + R₄
R₃₄ = 1500 Ω
This resistance is in parallel with R₂. The combined resistance is:
1/R₂₃₄ = 1/R₃₄ + 1/R₂
R₂₃₄ = 750 Ω
This resitance is in series with R₁. The total resistance is:
R = R₂₃₄ + R₁
R = 1000 Ω
Using Ohm's law, the total current is:
V = IR
I = 0.1 A
The voltage drop across R₁ is:
V = IR
V₁ = 25 V
The voltage drop across R₂ is:
V₂ = 100 V − V₁
V₂ = 75 V
The voltage drop across R₃ is:
V₃ = V₃₄ R₃ / R₃₄
V₃ = 25 V
The voltage drop across R₄ is:
V₄ = V₃₄ − V₃
V₄ = 50 V
Using Ohm's law, the current through each resistor is:
I₁ = 0.1 A
I₂ = 0.05 A
I₃ = 0.05 A
I₄ = 0.05 A
we know that
the intersecting chords theorem states that when two chords intersect each other inside a circle, the products of their segments are equal.
so
in this problem
substitutes the values
the length of segment vt is equal to
substitute the value of x
therefore
the answer is