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MHT CET 2026 (20 May, Shift 1) · Wheatstone Bridge & Metre Bridge

Wheatstone Bridge & Metre Bridge question from MHT CET 2026 (20 May, Shift 1)

Q6MHT CET 2026 · 20 MAY · SHIFT 1Medium

Wheatstone Bridge & Metre Bridge

A balanced meter bridge is shown in the circuit diagram. The meter bridge wire has resistance 2 Ωcm2\ \frac{\Omega}{cm}. The current drawn from the battery is (Internal resistance of the battery is negligible)

Figure

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Answer: (d)

  1. Balance: 3x=3070⇒x=7 Ω\dfrac{3}{x} = \dfrac{30}{70} \Rightarrow x = 7\ \Omega
  2. Gap branch: 3+7=10 Ω3 + 7 = 10\ \Omega, current 1010=1\dfrac{10}{10} = 1 A
  3. Wire (100 cm): 100×2=200 Ω100 \times 2 = 200\ \Omega, current 10200=0.05\dfrac{10}{200} = 0.05 A
  4. Total I=1+0.05=1.05I = 1 + 0.05 = 1.05 A
  5. So the answer is (d) 1.051.05 A.
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