Two identical charges repel each other with a force equal to 10 mgwt they are 0.6 m

⇦

⇨

Two identical charges repel each other with a force equal to 10 mgwt they are 0.6 m apart in air. (g=10 ms⁻²). The value of each charge is

Options

(a) 2 mC
(b) 2×10⁻⁷ mC
(c) 2 nC
(d) 2 μC

Correct Answer:

2 μC

Explanation:

F = (1 / 4πε₀) (q₁q₂ / d²)
Therefore, (10 × 10⁻³) × 10 = [(9 × 10⁹) × q²] / (0.06)²
or, q² = (10⁻¹ × 0.36) / (9 × 10⁹) = 4 / 10¹² = 4 × 10⁻¹²
or, q = 2 × 10⁻⁶ C = 2 μC

Related Questions:

1. Certain quantity of water cools from 70⁰ C to 60⁰C in the first 5 minutes and to 54⁰C
2. At a given temperature the root mean square velocities of oxygen and hydrogen
3. A source of light is placed at a distance of 50 cm from a photocell and the stopping
4. The frequency of light ray having the wavelength 3000Å is
5. For CE transistor amplifier, the audio signal voltage across the collector resistance

Topics: Electrostatics (146)
Subject: Physics (2479)

---

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

---

Share this page with your friends