| ⇦ | 
| ⇨ |
The electric potential at a point in free space due to a charge Q coulomb is Q x 10¹¹ volts. The electric field at that point is
Options
(a) 4π?￢ﾂﾀQ x 10²² volt/m
(b) 12π?￢ﾂﾀQ x 10²⁰ volt/m
(c) 4π?￢ﾂﾀQ x 10²⁰ volt/m
(d) 12π?￢ﾂﾀQ x 10²² volt/m
Correct Answer:
4π?￢ﾂﾀQ x 10²² volt/m
Explanation:
Given that V = Q x 10¹¹ volts Electric potential at point is given by
V = 1 / 4π?￢ﾂﾀ . Q/r or,
Q x 10¹¹ = 1 / 4π?￢ﾂﾀ . Q/r
r = 1 / 4π?￢ﾂﾀ.10⁻¹¹ m.
As |E| = |V| / r = Q x 10¹¹ / (1 / 4π?￢ﾂﾀ.10⁻¹¹)
= 4π?￢ﾂﾀQ x 10²² volt/m
Related Questions: - In a radioactive decay process, the negatively charged emitted β- particles are
- The frequency of a light wave in a material is 2 x 10¹⁴ Hz and wavelength is 5000Å.
- An interference pattern was made by using red light. If the red light
- Current in a coil changes from 4 A to zero in 0.1 second and the emf induced is 100V
- A spring of spring constant 5 x 10³ N/m is stretched initially by 5 cm
Topics: Electrostatics
(146)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In a radioactive decay process, the negatively charged emitted β- particles are
- The frequency of a light wave in a material is 2 x 10¹⁴ Hz and wavelength is 5000Å.
- An interference pattern was made by using red light. If the red light
- Current in a coil changes from 4 A to zero in 0.1 second and the emf induced is 100V
- A spring of spring constant 5 x 10³ N/m is stretched initially by 5 cm
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
Leave a Reply