Electric field from force on charge

Steps:

• Use the formula for electric force: F = qE, so E = F / q.
• Convert charge: q = +2 μC = 2 × 10^{-6} C.
• Calculate magnitude: E = (1.0 × 10^{-5} N) / (2 × 10^{-6} C) = 5.0 V/m.
• Determine direction: Positive charge experiences upward force, so field points upwards.

Why D is correct:

• The formula E = F/q yields 5.0 V/m upwards, as positive q aligns force direction with field direction.

Why the others are wrong:

• A: Incorrect magnitude (0.20 instead of 5.0) and wrong direction (downwards).
• B: Correct magnitude but wrong direction (upwards force on +q requires upwards field).
• C: Correct magnitude but wrong direction (downwards).

Final answer: D