THE PRACTICE STUDIO
Go slowly. Ask why. Make it yours.
PRACTICE / Electric field lines
A field arrow has a direction as well as a size
A positive point charge of 5 nC is at the origin. Point P is 0.30 m directly below it on the negative y axis. Use k = 9×10⁹ N·m²/C².
What is the signed y component of the electric field at P?
Organize the givens & assumptions
- Q = +5 nC
- P = (0, −0.30 m)
- k = 9×10⁹ N·m²/C²
Electrostatic point-charge field in vacuum, no other sources. A field-line arrow points in the direction of force on a positive test charge.
- A
- B
- C
- D
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