The figure on the right shows plot of the equipotentials for an arrangement of c
ID: 1778365 • Letter: T
Question
The figure on the right shows plot of the equipotentials for an arrangement of charges. The numbers represent the potentials (in volts) of each of the equipotential lines. Equipotential lines are shown for potentials beginning at -0.7 V and increasing by 0.3 V up to 1.7 V. There could be equipotential lines for potentials less than -0.7 or greater than 1.7, but these are not shown for clarity.1. At which point or points is a positive charge located?
A B C None
2. At which point or points is a negative charge located?
A B C None
3. At which point or points would the electric field have the greatest magnitude?
P Q R S T None
4. At which point or points is the electric field zero?
P Q R S T None
5. At which point or points would the electric field be weakest but non-zero?
P Q R S T None
6. At which point or points would the electric field point have +x and +y components (i.e., the electric field points up and to the right)?
P Q R S T None
7. An electron released from rest at point T would move in what direction?
7---Select---+x+y-x-yNone of the above
Explanation / Answer
1) Positive charge is at B and A as Potential is positive in their vicinity
2) Negative charge is at C as Potential is negative in in its vicinity.
3) Equipoential lines are more dense near Q. -dV/dx = E , change in potential is maximum there and hence maximum E. Moreover E.F. due to all 3 charges add up there.
4)E could be zero near R as there is no change in potential foa a large disance.