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Concepts Of Physics MCQ Edition [Volume 2]PhysicsElectric Current in Conductors

Two resistors, labeled A and B , have resistances R_A and R_B respectively, where R_A < R_B . The materials of these resistors have resistivities ho_A and ho_B .

Options

  1. AThe provided information is insufficient to establish a relation between _A and _B .
  2. B_A < _B
  3. C_A > _B
  4. D_A = _B

Correct answer

A. The provided information is insufficient to establish a relation between _A and _B .

Step-by-step solution

The resistance of a conductor is given by R = l A where is the resistivity of the material, l is the length, and A is the cross-sectional area. Given R_A Since the dimensions ( l and A ) of the two resistors are not provided, we cannot compare the resistivities _A and _B . The provided information is insufficient to establish a relation between _A and _B .

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