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A plastic scale after being rubbed against dry hair attracts bits of paper as it acquires
1. Positive charge
2. Negative charge
3. Neutral
4. Both positive and negative charges

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Correct Answer - Option 2 : Negative charge

The correct answer is Negative charge.

  • A plastic scale after being rubbed against dry hair attracts bits of paper as it acquires a negative charge.
  • The plastic scale gets electrically charged due to rubbing against dry hair.
  • The plastic scale acquires charge due to static electricity.
  • A temporary collection of charges will form near the rubbed surface of the plastic scale.
  • The bits of paper are electrically neutral.
  • Within the paper bits, the electrons get either attracted or repelled based on the charge of the plastic scale.
  • The electrically charged scale exerts an electric force against the paper bits and attracts them.
  • When a plastic scale is rubbed against dry hair, the material that has a stronger affinity for electrons pulls them from the other material.
    • A negative charge will produce on the material that has gained electrons.
    • A net positive charge will produce on the material that has lost electrons.

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