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Class 12 · Physics · Easy
→When the positive test charge at a point is doubled, the measured force doubles. What conclusion follows about the electric field?
Class 12 · Physics · Hard
→At the midpoint of two equal opposite charges the electric potential can be zero, but why is electric field not zero?
Class 12 · Physics · Hard
→At a point the electric field is zero but electric potential is positive. In which arrangement can this happen?
Class 12 · Physics · Hard
→In the same electric field the force magnitudes on a proton and an electron are equal. Why are their accelerations not equal?
Class 12 · Physics · Medium
→A proton and an electron are placed in the same uniform electric field. Which statement about the magnitudes of the forces is correct?
Class 12 · Physics · Medium
→An electron is released in a uniform westward electric field. In which direction will it accelerate?
Class 12 · Physics · Medium
→A positive charge is held at rest in a uniform eastward electric field. What happens just after the external force is removed?
Class 12 · Physics · Hard
→Electrostatic field lines do not form closed loops. What deeper idea is this related to?
Class 12 · Physics · Medium
→If two field lines are assumed to intersect, what contradiction arises about force on a positive test charge at that point?
Class 12 · Physics · Medium
→On a curved field line the tangent directions at two nearby points are different. What conclusion follows?
Class 12 · Physics · Medium
→Points A and B lie on field lines. Lines are closer near A and farther near B. Where will the force on the same positive charge be greater?
Class 12 · Physics · Medium
→If field lines in a small region are nearly parallel but not equally spaced, is the electric field uniform?
Class 12 · Physics · Medium
→In a non-uniform field, the lines point upward and become sparser upward. What happens to the force on an electron and to its magnitude?
Class 12 · Physics · Medium
→A positive test charge is placed in a non-uniform field where field lines become denser toward the right. Which statement about the force is correct?
Class 12 · Physics · Medium
→If the electric field is zero at one point but nonzero at nearby points, how should that zero-field point be understood?
Class 12 · Physics · Medium
→A field line is shown oblique to a conductor surface. What is the main defect in the diagram?
Class 12 · Physics · Hard
→Why are electric field lines drawn more densely near the pointed part of a charged conductor?
Class 12 · Physics · Hard
→If a positive charge is placed inside the cavity of a conductor, which statement about electric field lines in the cavity is correct?
Class 12 · Physics · Medium
→A closed conductor has an empty cavity. If a very strong external electric field is applied, what will the electric field inside the cavity be?
Class 12 · Physics · Medium
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