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Q. A dipole consists of two charges +q and -q separated by a distance d. What is the dipole moment?
  • A. qd
  • B. q/d
  • C. q^2d
  • D. q/d^2
Q. A dipole consists of two charges +q and -q separated by a distance d. What is the expression for the dipole moment?
  • A. qd
  • B. q/d
  • C. q^2d
  • D. q/d^2
Q. A dipole consists of two equal and opposite charges separated by a distance of 0.1m. What is the dipole moment if each charge is 1μC?
  • A. 1 × 10^-7 C m
  • B. 1 × 10^-6 C m
  • C. 1 × 10^-5 C m
  • D. 1 × 10^-4 C m
Q. A dipole consists of two equal and opposite charges separated by a distance. What happens to the dipole moment if the distance is doubled?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. A dipole moment is defined as the product of charge and the distance between the charges. What is the dipole moment of a dipole consisting of charges +2μC and -2μC separated by 0.1m?
  • A. 4 × 10^-7 C m
  • B. 2 × 10^-7 C m
  • C. 2 × 10^-6 C m
  • D. 4 × 10^-6 C m
Q. A dipole moment p is placed in a uniform electric field E. What is the torque experienced by the dipole?
  • A. pE
  • B. pE sin θ
  • C. pE cos θ
  • D. 0
Q. A hollow cylinder with charge density λ is placed along the z-axis. What is the electric field at a point outside the cylinder?
  • A. λ/(2πε₀r)
  • B. λ/(4πε₀r²)
  • C. Zero
  • D. λ/(ε₀r)
Q. A hollow sphere has a charge +Q distributed uniformly on its surface. What is the electric field at a point inside the sphere?
  • A. Q/(4πε₀r²)
  • B. 0
  • C. Q/(4πε₀R²)
  • D. Q/(4πε₀R)
Q. A hollow sphere has a charge Q distributed uniformly over its surface. What is the electric field inside the sphere?
  • A. Q/(4πε₀R²)
  • B. 0
  • C. Q/(4πε₀)
  • D. Q/(4πε₀R)
Q. A hollow sphere has a charge Q uniformly distributed on its surface. What is the electric field inside the sphere?
  • A. Q/4πε₀R²
  • B. 0
  • C. Q/ε₀
  • D. Q/4πε₀
Q. A hollow sphere with charge Q has a radius R. What is the electric field at a point inside the sphere?
  • A. Q/(4πε₀R²)
  • B. 0
  • C. Q/(4πε₀R)
  • D. Q/(2πε₀R²)
Q. A hollow spherical conductor carries a charge Q. What is the electric field inside the cavity?
  • A. Q/(4πε₀r²)
  • B. 0
  • C. Q/(4πε₀R²)
  • D. Q/(4πε₀R)
Q. A long straight wire carries a uniform linear charge density λ. What is the electric field at a distance r from the wire?
  • A. λ/(2πε₀r)
  • B. λ/(4πε₀r²)
  • C. λ/(2πε₀r²)
  • D. 0
Q. A parallel plate capacitor has a potential difference of V across its plates. What is the electric field between the plates?
  • A. V/d
  • B. d/V
  • C. V²/d
  • D. d²/V
Q. A point charge +Q is placed at the center of a spherical Gaussian surface of radius R. What is the electric flux through the surface?
  • A. 0
  • B. Q/ε₀
  • C. Q/(4πε₀R²)
  • D. Q/(4πε₀R)
Q. A point charge +Q is placed at the center of a spherical Gaussian surface. What is the total electric flux through the surface?
  • A. 0
  • B. Q/ε₀
  • C. Q/4πε₀
  • D. 4πQ/ε₀
Q. A point charge of +5 µC is placed at the origin. What is the electric potential at a point 2 m away from the charge?
  • A. 1125 V
  • B. 450 V
  • C. 225 V
  • D. 0 V
Q. A point charge of +Q is placed at the center of a spherical Gaussian surface. What is the total electric flux through the surface?
  • A. 0
  • B. Q/ε₀
  • C. Q/2ε₀
  • D. 4πQ/ε₀
Q. A point charge of +Q is placed at the center of a spherical shell of radius R with surface charge density σ. What is the electric field inside the shell?
  • A. 0
  • B. Q/(4πε₀R²)
  • C. σ/ε₀
  • D. Q/(4πε₀R)
Q. A point charge Q is placed at the center of a cube. What is the electric flux through one face of the cube?
  • A. Q/ε₀
  • B. Q/6ε₀
  • C. Q/4ε₀
  • D. 0
Q. A point charge Q is placed at the center of a spherical Gaussian surface. What is the electric flux through the surface?
  • A. 0
  • B. Q/ε₀
  • C. Q/4πε₀
  • D. Q²/ε₀
Q. A spherical conductor has a charge Q. What is the electric potential inside the conductor?
  • A. 0
  • B. Q/(4πε₀r)
  • C. Q/(4πε₀R)
  • D. Constant throughout
Q. A spherical conductor has a radius R and carries a charge Q. What is the electric potential on its surface?
  • A. kQ/R
  • B. kQ/2R
  • C. 0
  • D. kQ/R²
Q. A spherical Gaussian surface of radius R encloses a charge Q. What is the electric field at a distance 2R from the center?
  • A. Q/4πε₀R²
  • B. Q/4πε₀(2R)²
  • C. 0
  • D. Q/ε₀(2R)²
Q. A spherical shell of radius R carries a total charge Q. What is the electric field at a point outside the shell?
  • A. 0
  • B. Q/(4πε₀R²)
  • C. Q/(4πε₀R)
  • D. Q/(4πε₀R³)
Q. A spherical shell of radius R carries a uniform charge Q. What is the electric field inside the shell?
  • A. Q/(4πε₀R²)
  • B. 0
  • C. Q/(4πε₀R)
  • D. Q/(4πε₀)
Q. A spherical shell of radius R carries a uniform surface charge density σ. What is the electric field inside the shell?
  • A. 0
  • B. σ/ε₀
  • C. σ/2ε₀
  • D. σ/4ε₀
Q. A uniform electric field of 200 N/C is present. What is the potential difference between two points 3 m apart?
  • A. 600 V
  • B. 400 V
  • C. 200 V
  • D. 800 V
Q. A uniformly charged sphere of radius R has a total charge Q. What is the electric field at a point outside the sphere (r > R)?
  • A. 0
  • B. Q/(4πε₀r²)
  • C. Q/(4πε₀R²)
  • D. Q/(4πε₀R)
Q. For a charged plane sheet, if the surface charge density is doubled, what happens to the electric field?
  • A. It remains the same
  • B. It doubles
  • C. It halves
  • D. It quadruples
Showing 61 to 90 of 363 (13 Pages)

Electrostatics MCQ & Objective Questions

Electrostatics is a crucial topic in physics that deals with the study of electric charges at rest. Understanding electrostatics is essential for students preparing for school exams and competitive tests, as it forms the foundation for many advanced concepts in physics. Practicing MCQs and objective questions on electrostatics not only enhances conceptual clarity but also boosts your confidence in tackling important questions during exams.

What You Will Practise Here

  • Fundamental concepts of electric charge and its properties
  • Understanding Coulomb's Law and its applications
  • Electric field and electric potential: definitions and calculations
  • Capacitance and capacitors: types and formulas
  • Gauss's Law and its significance in electrostatics
  • Concept of electric dipoles and their behavior in electric fields
  • Key diagrams and graphical representations related to electrostatics

Exam Relevance

Electrostatics is a significant topic in various exams, including CBSE, State Boards, NEET, and JEE. It frequently appears in the form of conceptual questions, numerical problems, and application-based scenarios. Students can expect to encounter questions that require them to apply Coulomb's Law, calculate electric fields, and analyze capacitor circuits. Familiarity with common question patterns will greatly aid in effective exam preparation.

Common Mistakes Students Make

  • Confusing the concepts of electric field and electric potential
  • Misapplying Coulomb's Law in multi-charge systems
  • Neglecting the direction of electric field lines in problem-solving
  • Overlooking the significance of units and dimensions in calculations
  • Failing to understand the behavior of capacitors in series and parallel

FAQs

Question: What is the difference between electric field and electric potential?
Answer: The electric field is a vector quantity that represents the force experienced by a unit positive charge, while electric potential is a scalar quantity that indicates the potential energy per unit charge at a point in an electric field.

Question: How do capacitors store energy?
Answer: Capacitors store energy in the form of an electric field created between their plates when a voltage is applied across them.

Now is the time to strengthen your understanding of electrostatics! Dive into our practice MCQs and test your knowledge on this vital topic. The more you practice, the better prepared you will be for your exams!

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