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NIOS Senior Secondary Physics — practice by topic

Browse 30 questions across 3 Physics topics. Choose what you want to revise, then open a question to check its answer and worked solution.

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Physics topics

Class 12 Physics (30)Electric Charges and Fields (30)Physics (30)

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Amber rubbed with fur gains electrons, so the amber ends up:Read the answer and worked solution →The fur that has rubbed amber has lost electrons, so it becomes:Read the answer and worked solution →Before rubbing, both the amber and the cloth were electrically:Read the answer and worked solution →A physicist records a charge in SI units, named after a French scientist. That unit is the:Read the answer and worked solution →

Worked practice questions

Amber rubbed with fur gains electrons, so the amber ends up:

  1. Negatively charged
  2. Positively charged
  3. Perfectly neutral
  4. Partially melted
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Correct answer: A. Negatively charged

1. Electrons carry negative charge. 2. Gaining them leaves a surplus of negative charge. 3. So the amber is negatively charged. _Source: OpenStax University Physics Volume 2, Chapter 5, Electric Charges and Fields._

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The fur that has rubbed amber has lost electrons, so it becomes:

  1. Partially melted
  2. Positively charged
  3. Negatively charged
  4. Perfectly neutral
Show answer and solution

Correct answer: B. Positively charged

1. Losing electrons leaves protons unbalanced. 2. The surplus is then positive. 3. So the fur is positively charged. _Source: OpenStax University Physics Volume 2, Chapter 5, Electric Charges and Fields._

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Before rubbing, both the amber and the cloth were electrically:

  1. Neutral
  2. Negative
  3. Positive
  4. Magnetic
Show answer and solution

Correct answer: A. Neutral

1. Each held equal positive and negative charge. 2. The two cancelled exactly. 3. So both were neutral. _Source: OpenStax University Physics Volume 2, Chapter 5, Electric Charges and Fields._

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