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Electrostatics - Electric Charges & Fields

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Q. A charge of +1 μC is placed in an electric field of strength 1000 N/C. What is the force experienced by the charge? (2023)
  • A. 0.001 N
  • B. 0.01 N
  • C. 1 N
  • D. 10 N
Q. A charge of +10 μC is placed in an electric field of 2000 N/C. What is the force experienced by the charge? (2023)
  • A. 20 N
  • B. 200 N
  • C. 2 N
  • D. 0.2 N
Q. A charge of +10 µC is placed in an electric field of strength 2000 N/C. What is the force acting on the charge? (2023)
  • A. 20 N
  • B. 200 N
  • C. 2 N
  • D. 0.2 N
Q. A charge of +5 μC is placed in an electric field of 1000 N/C. What is the work done in moving the charge 0.2 m in the direction of the field? (2022)
  • A. 1 J
  • B. 0.1 J
  • C. 0.5 J
  • D. 2 J
Q. A charge of +5 µC is placed in an electric field of 300 N/C. What is the work done in moving the charge 0.2 m in the direction of the field? (2019)
  • A. 30 J
  • B. 12 J
  • C. 6 J
  • D. 3 J
Q. A charge of -2 µC is placed in an electric field of 500 N/C. What is the direction of the force acting on the charge? (2023)
  • A. Towards the positive charge
  • B. Away from the positive charge
  • C. No force
  • D. Depends on the field strength
Q. If a charge of +1 µC is placed in an electric field of 1000 N/C, what is the force experienced by the charge? (2019)
  • A. 0.001 N
  • B. 1 N
  • C. 10 N
  • D. 0.1 N
Q. If a charge of +1 µC is placed in an electric field of 2000 N/C, what is the force acting on the charge? (2021)
  • A. 0.002 N
  • B. 0.2 N
  • C. 2 N
  • D. 20 N
Q. If a charge of +10 μC is placed in an electric field of strength 200 N/C, what is the force experienced by the charge? (2019)
  • A. 200 N
  • B. 2 N
  • C. 20 N
  • D. 0.5 N
Q. If the charge on a capacitor is doubled while keeping the voltage constant, what happens to the capacitance? (2022)
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. If the charge on a capacitor is doubled, what happens to the electric field between the plates? (2022)
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. If the charge on an object is tripled, what happens to the electric field produced by that charge? (2020)
  • A. It triples
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. If two charges of +2 µC and -2 µC are placed 1 m apart, what is the net electric field at the midpoint? (2023)
  • A. 0 N/C
  • B. 4 N/C
  • C. 2 N/C
  • D. 8 N/C
Q. If two identical charges are placed 1 m apart, what will be the electric field at a point midway between them? (2019)
  • A. 0 N/C
  • B. kq/2
  • C. kq
  • D. 2kq
Q. In a uniform electric field, the potential difference between two points is 10 V. If the distance between these points is 2 m, what is the strength of the electric field? (2023)
  • A. 5 N/C
  • B. 10 N/C
  • C. 20 N/C
  • D. 2 N/C
Q. The electric field due to a dipole at a point along the axial line is given by which formula? (2023)
  • A. k * p / r²
  • B. k * p / r³
  • C. k * p / r
  • D. k * p / r⁴
Q. Two identical charges are placed 1 m apart. If the distance is reduced to 0.5 m, how does the force between them change? (2022)
  • A. It doubles
  • B. It remains the same
  • C. It quadruples
  • D. It halves
Q. Two identical charges are placed 1 m apart. If the magnitude of each charge is doubled, what happens to the force between them? (2022)
  • A. It remains the same
  • B. It doubles
  • C. It quadruples
  • D. It halves
Q. What happens to the electric field when the charge is doubled while keeping the distance constant? (2023)
  • A. It doubles
  • B. It halves
  • C. It quadruples
  • D. It remains the same
Q. What is the electric field at a distance of 1 m from a charge of +10 µC? (2019)
  • A. 9000 N/C
  • B. 10000 N/C
  • C. 11000 N/C
  • D. 12000 N/C
Q. What is the electric field at a distance of 1 m from a charge of -4 μC? (2019)
  • A. -3600 N/C
  • B. -900 N/C
  • C. 900 N/C
  • D. 3600 N/C
Q. What is the electric field at a point due to a uniformly charged infinite plane sheet? (2020)
  • A. 0
  • B. σ/2ε₀
  • C. σ/ε₀
  • D. σ/4ε₀
Q. What is the electric field due to a point charge of +10 µC at a distance of 0.1 m? (2023)
  • A. 9000 N/C
  • B. 900 N/C
  • C. 90 N/C
  • D. 9 N/C
Q. What is the electric field due to a point charge of +5 µC at a distance of 0.2 m? (2022)
  • A. 11250 N/C
  • B. 5625 N/C
  • C. 22500 N/C
  • D. 4500 N/C
Q. What is the potential difference between two points in an electric field if the electric field strength is 50 N/C and the distance between the points is 0.4 m? (2023)
  • A. 20 V
  • B. 10 V
  • C. 5 V
  • D. 2 V
Q. What is the potential difference between two points in an electric field of 400 N/C separated by 0.5 m? (2022)
  • A. 200 V
  • B. 100 V
  • C. 50 V
  • D. 80 V
Q. What is the potential energy of a system of two charges +3 μC and +4 μC separated by 0.2 m? (2023)
  • A. -54 J
  • B. 54 J
  • C. 0 J
  • D. 27 J
Q. What is the potential energy of a system of two charges +3 µC and +4 µC separated by 0.3 m? (2023)
  • A. -0.12 J
  • B. 0.12 J
  • C. 0.36 J
  • D. 0.24 J
Q. What is the potential energy of two charges +3 μC and +4 μC separated by 0.2 m? (2023)
  • A. -54 J
  • B. 54 J
  • C. 0.54 J
  • D. 5.4 J
Q. Which of the following is a property of electric field lines? (2023)
  • A. They can be broken
  • B. They can be created
  • C. They can be destroyed
  • D. They cannot intersect
Showing 1 to 30 of 30 (1 Pages)

Electrostatics - Electric Charges & Fields MCQ & Objective Questions

Understanding "Electrostatics - Electric Charges & Fields" is crucial for students preparing for school and competitive exams. This topic not only forms the foundation of various physics concepts but also frequently appears in exam papers. Practicing MCQs and objective questions helps reinforce your knowledge and boosts your confidence, ensuring you score better in your exams.

What You Will Practise Here

  • Fundamental concepts of electric charges and their properties
  • Understanding electric fields and their graphical representation
  • Key formulas related to Coulomb's law and electric field strength
  • Principles of superposition and electric field due to multiple charges
  • Applications of Gauss's law in solving problems
  • Concept of electric potential and its relation to electric fields
  • Important definitions and diagrams related to electrostatics

Exam Relevance

The topic of "Electrostatics - Electric Charges & Fields" is a significant part of the syllabus for CBSE, State Boards, NEET, and JEE. It often features in various formats, including direct questions, numerical problems, and conceptual applications. Students can expect to encounter questions that test their understanding of Coulomb's law, electric fields, and potential energy, making it essential to master these concepts for effective exam preparation.

Common Mistakes Students Make

  • Confusing the direction of electric field lines and force on charges
  • Misapplying Coulomb's law in multi-charge systems
  • Overlooking the significance of vector quantities in electric fields
  • Neglecting units and dimensions while solving numerical problems

FAQs

Question: What is Coulomb's law?
Answer: Coulomb's law describes the force between two charged objects, stating that the force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

Question: How do electric fields relate to electric charges?
Answer: Electric fields are created by electric charges and represent the force that a charge would experience at any point in space.

Now is the time to enhance your understanding of "Electrostatics - Electric Charges & Fields" by solving practice MCQs. Test your knowledge, identify your strengths and weaknesses, and prepare effectively for your upcoming exams!

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