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Class 12 · Physics
→A small positive test charge gets acceleration towards north in a field. If its magnitude is doubled, what is the direction of electric field at the same point?
Class 12 · Physics
→At a point the electric field is zero. Must the electric potential there also be zero?
Class 12 · Physics
→If field lines are straight and parallel but spacing gradually increases, what is the best conclusion about the field?
Class 12 · Physics
→In a region field lines are equally spaced but slightly curved. Why should it not be treated as a perfectly uniform field?
Class 12 · Physics
→The electric field due to a point charge at one point is four times that at another point on the same radial line. Which statement about distance can be correct?
Class 12 · Physics
→The density of field lines at two points is in the ratio 3 to 1. What will be the approximate ratio of forces on the same positive charge?
Class 12 · Physics
→In a uniform electric field, field lines are straight and parallel. If the arrow direction of the lines is reversed, which quantity changes?
Class 12 · Physics
→If a closed metal sphere has no free charge inside its cavity and is in electrostatic condition, what is the electric field inside the metal of the sphere?
Class 12 · Physics
→Electric field lines are shown oblique to a conductor surface. In electrostatic condition what does this indicate?
Class 12 · Physics
→At a point tangent to one electric field line shows east direction, while a nearby second line at the same point shows north direction. Why is this impossible?
Class 12 · Physics
→At a point two electric fields of equal magnitude are perpendicular to each other. What will be the magnitude of the net field?
Class 12 · Physics
→At a point one field is 12 newton per coulomb towards north and another is 5 newton per coulomb towards south. What is the net field?
Class 12 · Physics
→If the distance from a point charge is halved and the source charge is also halved, how will the electric field change?
Class 12 · Physics
→Why is the net electric field at the exact midpoint between equal magnitude positive and negative charges not zero?
Class 12 · Physics
→Two equal negative charges are placed on a line. At a point slightly above the exact midpoint what is the direction of the net electric field?
Class 12 · Physics
→Two equal positive charges are placed on a straight line. At a point slightly above their exact midpoint what will be the direction of the net electric field?
Class 12 · Physics
→At a point the electric field is towards east. Which statement is correct about the forces on equal magnitude positive and negative charges placed at that point?
Class 12 · Physics
→To determine field-line direction near a charge, what should be checked first?
Class 12 · Physics
→If two electric fields at a point are perpendicular, how is the direction of resultant field found?
Class 12 · Physics
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