Verified Solution • 2025–26 Session moderate

QPages 196-197: Q2: HC Verma: Concepts of Physics - Volume 2 Electric Current in Conductors Pages 196-197: Q2 Solution: Two resistors A and B have resistances and , respectively, and…

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often equate lower resistance with lower resistivity, but $R= ho,L/A$. Without knowing the lengths and cross‑sectional areas of the two resistors, the resistivities cannot be compared.

Two resistors A and B have resistances RAR_A and RBR_B, respectively, and RA<RBR_A < R_B. The resistivities of their materials are ρA\rho_A and ρB\rho_B.

Multiple Choice Options

  • A ρA>ρB\rho_A > \rho_B
  • B ρA=ρB\rho_A = \rho_B
  • C ρA<ρB\rho_A < \rho_B
  • D The information is not sufficient to find the relation between ρA\rho_A and ρB\rho_B

Step-by-Step Verified Solution

**Answer:** (d) The information is not sufficient to find the relation between __A and __B. **Step-by-Step Explanation:** Resistance depends on resistivity, length, and area. Without knowing the dimensions, we cannot compare resistivities.

All Questions in this Chapter

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