A +15-nC point charge is placed on the x axis at x = 1.5 m, and a ...

[CORALGRILL2014]

A +15-nC point charge is placed on the x axis at x = 1.5 m, and a -20-nC charge is placed on the y axis at y = -2.0m. What is the magnitude of the electric field at the origin?
 a. 105 N/C
  b. 15 N/C
  c. 75 N/C
  d. 45 N/C
  e. 60 N/C

Question 2

A +2.0-nC point charge is placed at one corner of a square (1.5 m on a side), and a -3.0-nC charge is placed on a corner diagonally away from the first charge. What is the magnitude of the electric field at either of the two unoccupied corners?
 a. 20 N/C
  b. 14 N/C
  c. 4.0 N/C
  d. 12 N/C
  e. 8.0 N/C

[SeanoH09]

Answer to Question 1

C

Answer to Question 2

B

[CORALGRILL2014]

Gracias!

[yeungji]

Excellent