Question:
Two point charges +4µC and -2µC are placed at a certain distance in air. They experience an attractive force F. If they are brought in contact with each other and then separated to the same distance, the new repulsive force between them will be :
Two point charges +4µC and -2µC are placed at a certain distance in air. They experience an attractive force F. If they are brought in contact with each other and then separated to the same distance, the new repulsive force between them will be :
Updated On: Mar 27, 2026
- 8F
- 4F
- F/8
- F/4
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
The correct option is (C):F/8
Was this answer helpful?
0
0
Top CUET Physics Questions
- Find the ratio of de-Broglie wavelengths of deuteron having energy E and \(\alpha\)-particle having energy 2E :
- CUET (UG) - 2026
- Physics
- Dual nature of radiation and matter
- If the protons and electrons are the only basic charges in the universe, all the observable charges have to be integral multiples of e. Thus, if an object contains x electrons and y protons, the net charge on the object will be
- CUET (UG) - 2025
- Physics
- Electric Charge
- A charge of magnitude \(3 \times 10^{-7}\) C is located at a distance of 0.09 m from a point P. Obtain the work done in bringing a charge of \(2 \times 10^{-9}\) C from infinity to the point P.
- CUET (UG) - 2025
- Physics
- Potential Due to a Charged Particle
- In a series combination of capacitors connected across a battery
- CUET (UG) - 2025
- Physics
- Photoelectric Effect
- A parallel plate capacitor having plate area 200 cm² and separation 2.0 mm holds a charge of 0.06 µC on applying a potential difference of 60 V. The dielectric constant of the material filled in between the plates is.
- CUET (UG) - 2025
- Physics
- capacitor with a dielectric
View More Questions
Top CUET Electric charges and fields Questions
- Choose the correct statements from the following:
A. The total charge in any isolated system remains constant.
B. When some charge is transferred to a conductor, it stays at the same place without getting distributed over the entire surface.
C. One Coulomb of negative charge is the total charge of \(6.25 \times 10^{18}\) electrons.
D. Electric field is a scalar field.
E. Permanent dipole means that the dipole moment \(\vec{P}\) exists irrespective of external electric field \(\vec{E}\).- CUET (UG) - 2023
- Physics
- Electric charges and fields
Match List-I with List-II.
Choose the correct answer from the options given below:List I(components of reactor) List-II(Function) A Uranium I The reaction rate can be controlled by it. B Moderator II Slows down the fast-moving neutrons C Control rod III Used for fission reaction D Coolant IV Transfers heat from core to turbine - CUET (UG) - 2022
- Physics
- Electric charges and fields
- Two point charges (-q) and (+4q) are placed at that separation ‘r’. Where should a third charge be placed so that the entire system of charges becomes in equilibrium?
- CUET (UG) - 2022
- Physics
- Electric charges and fields
- Match list I with list II
List I (electronic device) List-II(Use/application) A Photodiode I Remote controls B Zener diode II. Amplifier C Light emitting diode III Voltage regulator D Transistor IV Photodetector
Choose the correct answer from the options given below:- CUET (UG) - 2022
- Physics
- Electric charges and fields
Top CUET Questions
- Find the ratio of de-Broglie wavelengths of deuteron having energy E and \(\alpha\)-particle having energy 2E :
- CUET (UG) - 2026
- Dual nature of radiation and matter
Rearrange the following parts to form a meaningful and grammatically correct sentence:
P. a healthy diet and regular exercise
Q. are important habits
R. that help maintain good physical and mental health
S. especially in today's busy world- CUET (UG) - 2025
- Sentence Arrangement
- A and B are partners sharing profits in the ratio of 2:1. C is admitted into the firm for 1/4 share of profits. C brings in Rs. 20,000 in respect of his capital. The capitals of old partners A and B, after all adjustments relating to goodwill, revaluation of assets and liabilities, etc., are Rs. 45,000 and Rs. 15,000 respectively. It is agreed that partners' capitals should be according to the new profit sharing ratio. Determine the new profit sharing ratio.
- CUET (UG) - 2025
- Reconstitution of Partnership
- Match List-I with List-II \[ \begin{array}{|l|l|l|} \hline \textbf{List-I} & \textbf{List-II} & \textbf{Matches} \\ \hline (A) \; \text{Cell constant} & (I) \; \text{cm}^{-1} & (A) - (I) \\ \hline (B) \; \text{Molar conductance} & (II) \; \Omega^{-1}\,\text{cm}^2\,\text{mol}^{-1} & (B) - (II) \\ \hline (C) \; \text{Specific conductance} & (III) \; \Omega^{-1}\,\text{cm}^{-1} & (C) - (III) \\ \hline (D) \; \text{Conductance} & (IV) \; \Omega^{-1} & (D) - (IV) \\ \hline \end{array} \]
- CUET (UG) - 2025
- Mole concept and Molar Masses
Rearrange the following parts to form a meaningful sentence:
A) despite the heavy rain
B) the match continued
C) and the players showed great determination
D) yesterday- CUET (UG) - 2025
- Sentence Arrangement
View More Questions