Question

1. Equipotential Lines (select all that apply):

a: are parallel to the electric field

b: are perpendicular to the electric field

c: become more dense as electric field strength increases

d: become less dense as electric field strength increases

2. Physicalg parallel plate capacitors have electric fields that are uniform between plates:

True or False

3. Idel parallel plate capacitors have non-zero fringing electric fields outside of the plates:

True or False

4. If a charge is held fixed at a constant electric potential and its charge is doubled, its potential energy:

a. is halved

b. remains the same

c. is doubled

d. is quadrupled

5. What would the equipotential lines looks like for an infinitely long line charge coming into and out of the paper?

Answer 1

(1) Equipotential lines are always perpendicular to electric field and also more dense as electric field strength increases.

so options(b) and (c) are true.

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(2) Electric field lines are not completely uniform between the plates of a physical parallel plate capacitor.It is not uniform at the edges of plate(called fringing effect).

So this statement is false.

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(3) This statement is true.Because there is no fringing effect in an ideal parallel plate capacitor.

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(4) Potential energy of charge inside the electric field is given by-

U=qV

So if electric potential is doubled then potential energy also doubled.

so option(c) is true.

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(5) Equipotential lines will be circular in shape.