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Karnataka PUC II Science Electric Charges and Fields — practice questions

Explore 26 free Electric Charges and Fields questions in Karnataka PUC II Science Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Electric Charges and Fields questions and exercises with answers

Showing questions 1–26 of 26.

In SI units, the magnitude of the elementary charge e is approximatelyRead the answer and worked solution →Which of the following is an insulator under normal conditions?Read the answer and worked solution →A body acquires a negative charge byRead the answer and worked solution →Three point charges +1, −3, and +5 (in arbitrary units) are placed in a closed system. What is the total charge of the system?Read the answer and worked solution →Two point charges of 2 μC each are placed 1 m apart in vacuum. The magnitude of the Coulomb force between them is closest toRead the answer and worked solution →Which scientist first experimentally demonstrated the quantisation of electric charge through his oil-drop experiment?Read the answer and worked solution →Approximately how many electrons are present in a charge of −1 C?Read the answer and worked solution →A cubic centimetre of copper contains roughly how many electrons in total?Read the answer and worked solution →If 10⁹ electrons leave a body every second, approximately how long is needed for the remaining body to develop a net positive charge of 1 C?Read the answer and worked solution →NEET · Physics · Electric Charges & Fields · Coulomb's Law — Gap FillRead the answer and worked solution →NEET · Physics · Electric Charges & Fields · Quantity to UnitRead the answer and worked solution →NEET · Physics · Electric Charges & Fields · Conductor or InsulatorRead the answer and worked solution →NEET · Physics · Electric Charges & Fields · Gauss's Law — MemoryRead the answer and worked solution →NEET · Physics · Electric Charges & Fields · Tap Like-Charge PairsRead the answer and worked solution →NEET · Physics · Electric Charges & Fields · Field at a PointRead the answer and worked solution →NEET · Physics · Electric Charges & Fields · Dipole or Monopole FieldRead the answer and worked solution →NEET · Physics · Electric Charges & Fields · Dipole Moment — Gap FillRead the answer and worked solution →NEET · Physics · Electric Charges & Fields · Force on Dipole in FieldRead the answer and worked solution →NEET · Physics · Electric Charges & Fields · Electric Field — TypingRead the answer and worked solution →NEET · Physics · Electric Charges & Fields · Quantity to FormulaRead the answer and worked solution →NEET · Physics · Electric Charges & Fields · Tap Field-Line PropertiesRead the answer and worked solution →NEET · Physics · Electric Charges & Fields · Field Inside or OutsideRead the answer and worked solution →NEET · Physics · Electric Charges & Fields · Capacitance — Gap FillRead the answer and worked solution →NEET · Physics · Electric Charges & Fields · Field of a Charged ShellRead the answer and worked solution →Judge a dipole sitting in a fieldRead the answer and worked solution →Drop each fact inside or outsideRead the answer and worked solution →

Worked practice questions

In SI units, the magnitude of the elementary charge e is approximately

  1. 1.6 × 10⁻¹⁹ C
  2. 1.6 × 10⁻¹⁰ C
  3. 9.0 × 10⁹ C
  4. 8.85 × 10⁻¹² C
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Correct answer: A. 1.6 × 10⁻¹⁹ C

e ≈ 1.602 × 10⁻¹⁹ C. 9×10⁹ is Coulomb's constant k, and 8.85×10⁻¹² is the permittivity of free space ε₀.

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Which of the following is an insulator under normal conditions?

  1. Glass
  2. Iron
  3. Copper
  4. Aluminium
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Correct answer: A. Glass

Conductors (metals like copper, aluminium, iron) allow charge to move freely. Glass, like most non-metals, offers high resistance and is an insulator.

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A body acquires a negative charge by

  1. Gaining protons
  2. Losing protons
  3. Losing electrons
  4. Gaining electrons
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Correct answer: D. Gaining electrons

Protons are bound in the nucleus and are not transferred in everyday charging. A body becomes negative by gaining electrons and positive by losing them.

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