Electric Potential and Capacitance

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Electric Potential and Capacitance MCQ & Objective Questions

Understanding the concepts of Electric Potential and Capacitance is crucial for students preparing for school and competitive exams. These topics not only form the foundation of electrostatics but also frequently appear in various examination formats. Practicing MCQs and objective questions helps reinforce your knowledge and boosts your confidence, ensuring you are well-prepared for any exam scenario.

What You Will Practise Here

  • Fundamental concepts of electric potential and its significance.
  • Capacitance: Definition, units, and types of capacitors.
  • Key formulas related to electric potential and capacitance.
  • Energy stored in a capacitor and its applications.
  • Diagrams illustrating electric field lines and equipotential surfaces.
  • Relationship between charge, voltage, and capacitance.
  • Practical applications of capacitors in circuits.

Exam Relevance

The topics of Electric Potential and Capacitance are integral to the physics syllabus of CBSE, State Boards, NEET, and JEE. Students can expect questions that test their understanding of definitions, formulas, and applications. Common question patterns include numerical problems, conceptual MCQs, and theoretical explanations, making it essential to master these areas for success in exams.

Common Mistakes Students Make

  • Confusing electric potential with electric field strength.
  • Misunderstanding the concept of capacitance and its dependence on physical attributes.
  • Neglecting the energy stored in capacitors during calculations.
  • Overlooking the significance of units when solving problems.

FAQs

Question: What is electric potential?
Answer: Electric potential is the amount of work done to move a unit positive charge from infinity to a point in an electric field.

Question: How is capacitance defined?
Answer: Capacitance is defined as the ability of a system to store charge per unit voltage, measured in farads (F).

Question: Why are capacitors important in circuits?
Answer: Capacitors are crucial for storing energy, filtering signals, and stabilizing voltage in electrical circuits.

Now is the time to enhance your understanding of Electric Potential and Capacitance! Dive into our practice MCQs and test your knowledge to excel in your exams.

Q. If the capacitance of a capacitor is doubled while the voltage remains constant, what happens to the charge stored?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. If the capacitance of a capacitor is doubled, what happens to the charge stored if the voltage remains constant?
  • A. Charge is halved
  • B. Charge remains the same
  • C. Charge is doubled
  • D. Charge is quadrupled
Q. If two capacitors are connected in series, how is the total capacitance (C_total) calculated?
  • A. 1/C_total = 1/C1 + 1/C2
  • B. C_total = C1 + C2
  • C. C_total = C1 * C2
  • D. C_total = C1 - C2
Q. If two capacitors of capacitance C1 and C2 are connected in series, what is the equivalent capacitance (Ceq)?
  • A. Ceq = C1 + C2
  • B. Ceq = 1 / (1/C1 + 1/C2)
  • C. Ceq = C1 * C2
  • D. Ceq = (C1 * C2) / (C1 + C2)
Q. What happens to the electric potential energy when a positive charge moves away from another positive charge?
  • A. It increases
  • B. It decreases
  • C. It remains the same
  • D. It becomes zero
Q. What is the electric field (E) due to a point charge (Q) at a distance (r)?
  • A. E = k * Q / r^2
  • B. E = k * Q * r^2
  • C. E = Q / (4 * π * ε * r)
  • D. E = Q / (4 * π * ε * r^2)
Q. What is the electric potential (V) at a distance (r) from a point charge (Q)?
  • A. V = k * Q / r
  • B. V = k * Q * r
  • C. V = Q / (4 * π * ε * r^2)
  • D. V = Q / (4 * π * ε * r)
Q. What is the formula for the energy stored in a capacitor?
  • A. U = 1/2 C V^2
  • B. U = C V
  • C. U = C V^2
  • D. U = 1/2 Q V
Q. What is the relationship between voltage (V), current (I), and resistance (R) according to Ohm's Law?
  • A. V = I * R
  • B. I = V * R
  • C. R = V / I
  • D. V = R / I
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