Electric Field and Potential Physics - Electric Field and Potential

• A
  If E = 0, V must be zero.
• ✓
  If V = 0, E must be zero.
• C
  If $\text{E}\neq0,$ V cannot be zero.
• D
  If $\text{V}\neq0,$ E cannot be zero.

Answer: B.

Figure, shows some of the electric field lines corresponding to an electric field. The figure suggests that,

• A
  $\mathrm{E}_{\mathrm{A}}>\mathrm{E}_8>\mathrm{E}_{\mathrm{e}}$
• B
  $\mathrm{E}_{\mathrm{A}}=\mathrm{E}_{\mathrm{B}}=\mathrm{E}_{\mathrm{e}}$
• ✓
  $ \mathrm{E}_{\mathrm{A}}=\mathrm{E}_{\mathrm{C}}>\mathrm{E}_{\mathrm{B}}$
• D
  $ \mathrm{E}_{\mathrm{A}}=\mathrm{E}_{\mathrm{C}}<\mathrm{E}_{\mathrm{B}}$

Answer: C.

• A
  Increases.
• B
  Decreases.
• C
  Remains the same.
• ✓
  May increase or decrease.

Answer: D.

• ✓
  Continuously increases.
• B
  Continuously decreases.
• C
  Increases then decreases.
• D
  Decreases then increases.

Answer: A.

Consider the situation of figure. The work done in taking a point charge from $P$ to A is $W_A$, from $P$ to $B$ is $W_B$ and from $P$ to $C$ is $W_C$.

• A
  $ W_A $
• B
  $W_A>W_B>W_C $
• ✓
  $W_A=W_B=W_C$
• D
  None of these.

Answer: C.