| ⇦ | 
| ⇨ |
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: - A spring of spring constant 5 x 10³ N/m is stretched initially by 5 cm
- A cockroach is moving with a velocity v in anticlockwise direction on the rim
- A linear aperture whose width is 0.02 cm is placed immediately in front of a lens
- A sample of HCl gas is placed in an electric field of 5 x 10⁴ N/C
- The pressure at the bottom of a tank containing a liquid does not depend on
Topics: Electrostatics
(146)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A spring of spring constant 5 x 10³ N/m is stretched initially by 5 cm
- A cockroach is moving with a velocity v in anticlockwise direction on the rim
- A linear aperture whose width is 0.02 cm is placed immediately in front of a lens
- A sample of HCl gas is placed in an electric field of 5 x 10⁴ N/C
- The pressure at the bottom of a tank containing a liquid does not depend on
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}