This page covers NDA Electric Charges & Fields with complete concept notes, 18 graded practice MCQs, key points and exam-specific tips. Free to study.
18graded MCQs · easy to hard · full solution & trap analysis
A charge of +6 μC is placed in an electric field of magnitude 500 N/C. What is the magnitude of the electric force experienced by the charge?
An electric charge of +2 C is located at the origin. What is the electric field magnitude at a distance of 3 m from this charge?
Two identical point charges repel each other with a force of 8 N when separated by 30 cm. What is the magnitude of each charge? (Take k = 9 × 10⁹ N·m²/C²)
Two point charges of +4 μC and -4 μC are separated by a distance of 2 m. What is the magnitude of the electric field at the midpoint between them?
According to Coulomb's Law, if the distance between two point charges is doubled, the electric force between them becomes:
Three charges +q, +q, and -2q are arranged at the vertices of an equilateral triangle. The electric field at the centroid of the triangle is:
What is the electric field at a point on the axis of a uniformly charged ring of radius R at a distance x from the center, where the ring has total charge Q?
A test charge of +1 nC experiences a force of 4 × 10⁻⁵ N in an electric field. The magnitude of the electric field at that location is:
Which of the following statements about electric field lines is INCORRECT?
A uniform electric field of magnitude 500 N/C points in the positive x-direction. A charge of -2 μC is placed in this field. What is the magnitude of force on the charge?
The electric field due to an infinite uniformly charged plane with surface charge density σ = 2 × 10⁻⁸ C/m² is (ε₀ = 8.85 × 10⁻¹² C²/N·m²)
Two identical charges of +3 μC each are placed 6 m apart. What is the magnitude of electric field at the midpoint between them?
Two point charges of +2 μC and +8 μC are separated by 10 cm. At what distance from the +2 μC charge will the electric field be zero?
A charge of +5 μC is placed at the origin. What is the magnitude of electric field at a distance of 2 m from the charge? (k = 9 × 10⁹ N·m²/C²)
Two charges of +6 μC and -6 μC are separated by 10 cm. What is the net electric field at the midpoint between them?
A point charge Q creates an electric field of 400 N/C at a distance of 3 m. What is the magnitude of charge Q? (k = 9 × 10⁹ N·m²/C²)
A uniform electric field of magnitude 200 N/C exists between two parallel plates separated by 4 cm. What is the potential difference between the plates?
Two point charges of +3 μC and +8 μC are separated by 5 cm in vacuum. What is the magnitude of the electric force between them? (k = 9 × 10⁹ N·m²/C²)