Electric Field and Field Lines
Physics ⇒ Electricity and Magnetism
Electric Field and Field Lines starts at 9 and continues till grade 12.
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See sample questions for grade 11
A charge of 1 C experiences a force of 10 N at a certain point. What is the electric field at that point?
A point charge of +2 μC is placed at the origin. What is the direction of the electric field at a point on the positive x-axis?
A positive test charge is placed in an electric field. In which direction will it move?
Calculate the electric field at a distance of 0.5 m from a charge of -3 × 10-6 C. (k = 9 × 109 N·m2/C2)
Calculate the magnitude of the electric field 0.2 m away from a point charge of 5 × 10-6 C in vacuum. (Take k = 9 × 109 N·m2/C2)
Describe the pattern of electric field lines around an isolated positive point charge.
Describe what happens to the electric field strength as the distance from a point charge increases.
Explain the difference between electric field and electric potential.
Explain why electric field lines never cross each other.
If the electric field at a point is 500 N/C, what is the force experienced by a charge of 2 μC placed at that point?
If the electric field at a point is directed north, in which direction would a negative charge placed at that point move?
If two equal but opposite charges are placed close to each other, what is the pattern of electric field lines between them called?
State Coulomb's law and explain its significance in the context of electric fields.
A point charge q is placed at the center of a cube. What is the total electric flux through all six faces of the cube?
A small positive test charge is placed at the midpoint between two equal positive point charges separated by a distance d. What is the net electric field at the midpoint?
A spherical shell of radius R carries a uniform surface charge density σ. What is the electric field at a point located at a distance r from the center, where r < R?
A thin, uniformly charged rod of length L has a total charge Q. Derive an expression for the electric field at a point P located a distance a from one end of the rod along the line of the rod's extension.
Explain why the electric field just outside the surface of a charged conductor is perpendicular to the surface.
Two point charges, +Q and -Q, are separated by a distance 2a. At what point(s) along the line joining them is the electric field zero?
