| ⇦ | 
| ⇨ |
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: - To what temperature should the hydrogen at room temperature (27°C) be heated at constant
- A bomb of mass 30 kg at rest exploded into two pieces of masses 18 kg
- The diameter of the eye ball of a normal eye is about 2.5 cm. The power of the eye
- If the self inductance of 500 turn coil is 125 mH, then the self inductance
- Out of the following options which one can be used to produce a propagating
Topics: Electrostatics
(146)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- To what temperature should the hydrogen at room temperature (27°C) be heated at constant
- A bomb of mass 30 kg at rest exploded into two pieces of masses 18 kg
- The diameter of the eye ball of a normal eye is about 2.5 cm. The power of the eye
- If the self inductance of 500 turn coil is 125 mH, then the self inductance
- Out of the following options which one can be used to produce a propagating
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
F =kq^2/r^2
10^-1 = 9×10^9×q^2/.6^2
√10^-10×.36/9=q
10^-5×.2=q or q2uc {u=10^-6}