Question Detail

PHY 102 Test Compilation PHY 102 3 Objective Question

Question

Magnitude of electric field where force on electron equals its weight? m_e = 9.11×10⁻³¹ kg, e = 1.6×10⁻¹⁹ C.
Options
A 2.00×10⁻¹¹ N/C
B 4.65×10⁻¹¹ N/C
C 5.00×10⁻¹¹ N/C
D 5.58×10⁻¹¹ N/C
Correct Answer
Correct Answer

Option D is the correct answer.

Detailed Explanation

Weight = mg = 9.11e-31 × 9.8 = 8.93e-30 N. E = F/q = 8.93e-30 / 1.6e-19 = 5.58×10⁻¹¹ N/C.

Hint

E = mg/q.

Question Info