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Which device provides some resistance to that speed difference?

  • A.A torque converter, which allows the engine to continue running while one of the driven wheels is spinning freely
  • B.A limited slip differential
  • C.A larger crown wheel, which increases the torque available at each of the two wheels of the driven axle behind
  • D.A lower final drive ratio

Answer: B

A limited slip unit uses clutches, gears or a viscous coupling to resist the difference, so torque can be biased towards the wheel with grip. Locking differentials go further and connect the shafts rigidly. Electronic brake based systems mimic the effect. Tracing the requirement back to the physical constraint that produces it makes the answer follow. Most errors here come from carrying across a result from a neighbouring case where it does not hold.

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