Question

True or false conceptual physics 2 questions from chapter 25.

1. [ ] The electrostatic potential difference between point A and B, ∆V_AB, can be calculated using a path integral, and ∆V_AB does not depend on the integral path used.

2.[ ] A common reference point for electrostatic potential is V = 0 at [infinity].

3. [ ] The magnitude of work required to bring a charge q from point A to point B is |qV_BA|.

4. [ ] eV is a unit for potential.

5. [ ] When a charged particle is accelerated from rest in an electric field, the amount of kinetic energy increased equals the amount of potential energy decreased, i.e., |1/2 mv^2| = |qΔV|

6. [ ] An electric field line points to the direction of higher electric potential.

7. [ ] An equipotential surface is always parallel to electric field lines.

8. [ ] The electrostatic potential generated by multiple charges, is the vector addition of the potentials generated by individual charges.

9. [ ] Inside a conductor, the electric field and potential are both zero.

10. [ ] The electric fields created by a point charge, a conducting sphere, and an insulator sphere are identical, if they all have the same amount of charge and the field is measured outside the spheres.

Answer 1

Step-by-step explanation:

1) TRUE; potential difference can be calculated using path integral. Since the electric field is a conservative, the potential difference can be calculated using any path.

2) TRUE; since potential due to a charge is inversely dependent on distance, at infinity the potential will be almost zero.

3) TRUE, W = q.VBA.

4) FALSE; eV is a unit for work (or) energy.

5) TRUE; since the electric force is conservative force. There will be no loss in energy, the decreased potential energy will be coverted to kinetic energy.

6) FALSE; in the direction of electric field the potential decreases.

7) FALSE; equipotential surface is perpendicular to the electric field lines.

8) FALSE; electrostatic potential is scalar quantity. It depends only on the charge and distance from it.

9) FALSE; Inside a conductor the electric field is zero but the electric potential is constant at the value that is at the surface of the conductor.

10) TRUE; as long as the field is being measured outiside the body the bodies act as point charges. So electric fields due to all types of bodies charged identically will be equal.