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Physics (AS & A Level) · Oct / Nov 2018 · Paper 11 · Question 35

9702Resistance and resistivity

The diagram shows a rectangular block with dimensions x, 2x and 3x. Electrical contact can be made to the block between opposite pairs of faces (for example, between the faces labelled R). Which statement describing the electrical resistance of the block is correct?

  1. AIt is maximum between the faces labelled P.
  2. BIt is maximum between the faces labelled Q.
  3. CIt is maximum between the faces labelled R.
  4. DIt is the same, whichever pair of faces is used.

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Correct answer: B. It is maximum between the faces labelled Q.

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