Two point charges whose magnitudes are -3 x 10⁻⁹ C and 3 x 10⁻⁹ C are separated by a distance of 3 c

JAMB Physics 2023 97 views

Two point charges whose magnitudes are -3 x 10⁻⁹ C and 3 x 10⁻⁹ C are separated by a distance of 3 cm. An electron is released from rest between the two charges. What is its velocity when it is 1 cm from the negative charge?

(k = 1/(4πε₀) = 9 x 10⁹ Nm²C⁻²)

(Mass of an electron, mₑ = 9.1 x 10⁻³¹ kg, Charge on an electron, e = 1.6 x 10⁻¹⁹ C)

  1. 3.42 x 10⁷ ms⁻¹
  2. 2.18 x 10⁷ ms⁻¹ ✓
  3. 4.38 x 10⁷ ms⁻¹
  4. 1.72 x 10⁷ ms⁻¹

Explanation

This physics concept involves analyzing the given values and applying relevant formulas. Work through the problem step by step using known equations and constants.

Identify what quantity needs to be found and which formula connects the given information to the answer. Substitute the values carefully, paying attention to units.

Check that your calculated answer matches one of the options provided. Understanding the underlying principle helps verify the solution makes physical sense.

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