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QJEEM25Ph077d: JEE Main 2025 Physics - Class 12 JEEM25Ph077d Solution: Sliding contact of a potentiometer is in the middle of the…

JEE Main 2025 (Online) 22nd January Morning Shift Physics - Current Electricity Question 9 English

Sliding contact of a potentiometer is in the middle of the potentiometer wire having resistance Rp=1ΩR_p=1 \Omega as shown in the figure. An external resistance of Re=2ΩR_e=2 \Omega is connected via the sliding contact. The electric current in the circuit is :

Multiple Choice Options

  • A 1.35 A
  • B 0.9 A
  • C 1.0 A
  • D 0.3 A

Step-by-Step Verified Solution

The circuit can be considered as

JEE Main 2025 (Online) 22nd January Morning Shift Physics - Current Electricity Question 9 English Explanation

∴Req=0.5+0.5×22+0.5=(510+1025)Ω=4550=910=0.9∴i=0.90.9=1 A

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