CUET · PHYSICS · PYQ PAPER 2025
The force between two small charged spheres having charges of \( 2 \times 10^{-7} \, \text{C} \) and \( 3 \times 10^{-7} \, \text{C} \), respectively, placed 30 cm apart in air would be.
- A \( 2 \times 10^{-3} \, \text{N} \)
- B \( 6 \times 10^{-7} \, \text{N} \)
- C \( 6 \times 10^{-3} \, \text{N} \)
- D \( 5 \times 10^{-7} \, \text{N} \)
Answer & Solution
Correct Answer
(C) \( 6 \times 10^{-3} \, \text{N} \)
Step-by-step Solution
Detailed explanation
\( F = k \frac{q_1 q_2}{r^2} \) \( F = (9 \times 10^9) \frac{(2 \times 10^{-7})(3 \times 10^{-7})}{(0.30)^2} \) \( F = (9 \times 10^9) \frac{6 \times 10^{-14}}{0.09} \) \( F = 6 \times 10^{-3} \, \text{N} \)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from PHYSICS
- Two metals, X and Y have work functions, 4 eV and 10 eV, respectively. The ratio of threshold wavelengths of metal X to metal Y isCUET 2025 Hard
- When we draw the variation of the potential energy of a pair of nucleons with their separations, thenCUET 2023 Easy
- A biconvex lens has radii of curvature of 10 cm each. If the refractive index of the material of the lens is 1.5, what will be its focal length in air ?CUET 2025 Hard
- Two coils of self inductances \( L_1 \) and \( L_2 \) are kept close to each other so that the effective flux in one is completely linked with the other. What is the mutual inductance M between them ?CUET 2023 Hard
- The speed of light in a medium whose critical angle is \(60^{\circ}\) will be:CUET 2023 Hard
- Electrostatic shielding is the phenomenon of protecting a certain region of space from :CUET 2023 Easy
More PYQs from CUET
- The net primary productivity (NPP) in an ecosystem can be represented by:CUET 2023 Easy
- Match List I with List II:
Choose the correct answer from the options given below :List-I List-ll A. \(Fe ^{2+}\) I. 2.84 BM B. \(Ni ^{2+}\) II. 0.00 BM C. \(Mn ^{2+}\) III. 4.90 BM D. \(Zn ^{2+}\) IV. 5.92 BM CUET 2023 Medium - The area bounded by the curve \(y=x|x|, x\)-axis and the ordinates \(x=-1\) and \(x=1\) is given by:CUET 2023 Easy
- What is the common name of the given compound?
CUET 2025 Medium - Match List-l with List-ll
Choose the correct answer from the options given below:List-l(Materials) List-lI(Conductivity ( \(\mathrm{S} \mathrm{m}^{-1}\) )) (A) Gold (I) \(1.0 \times 10^{-16}\) (B) Germanium (II) \(1.2 \times 10\) (C) Glass (III) \(4.5 \times 10^3\) (D) Graphite (VI) \(2.0\) CUET 2025 Hard - The complex \(\left[ Co \left( NH _3\right)_4\left( NO _2\right)_2\right] Cl\) exhibits:
A. Coordination isomerism
B. Linkage isomerism
C. Solvate isomerism
D. Ionisation isomerism
E. Geometrical isomerism
Choose the correct answer from the options given below:CUET 2023 Medium