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Class 12 · Physics · Medium
→If the distance from a point charge is doubled and the charge is made four times as large, how will the new electric field compare with the old one?
Class 12 · Physics · Medium
→The electric field due to a point charge at point A is nine times that at point B. If both points lie in the same direction from the charge, what is the ratio of their distances?
Class 12 · Physics · Hard
→At a point on the perpendicular bisector of two equal negative charges, what is the direction of the net electric field?
Class 12 · Physics · Hard
→At a point on the perpendicular bisector of two equal positive charges, what is the direction of the net electric field?
Class 12 · Physics · Easy
→In an upward electric field, in which direction must an external force be applied to keep a positive charge at rest?
Class 12 · Physics · Medium
→At a point, field lines are directed south. In which direction should an external force be applied to keep a negative charge at rest?
Class 12 · Physics · Medium
→If field lines are dense in a region but the force on a charge is small, what is the most likely reason?
Class 12 · Physics · Easy
→If the test charge is too large, what problem can arise in the definition of electric field?
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
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