CUET · PHYSICS · PYQ PAPER 2025
Two point charges \( q_1 = 36 \text{ }\mu\text{C} \) and \( q_2 = -9 \text{ }\mu\text{C} \) are placed at a distance of 30 cm. The distance from \( q_1 \) where the net electric field is zero, will be :
- A 10 cm
- B 20 cm
- C 60 cm
- D 30 cm
Answer & Solution
Correct Answer
(C) 60 cm
Step-by-step Solution
Detailed explanation
\( \frac{k|q_1|}{x^2} = \frac{k|q_2|}{(x-d)^2} \) \( \frac{36}{x^2} = \frac{9}{(x-30)^2} \) \( \frac{4}{x^2} = \frac{1}{(x-30)^2} \) \( \frac{2}{x} = \frac{1}{x-30} \) \( 2(x-30) = x \) \( 2x - 60 = x \) \( x = 60 \text{ cm} \)
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
- An electron of mass \( 9.1 \times 10^{-31} \text{ kg} \) carrying charge \( 1.6 \times 10^{-19} \text{ C} \), is moving horizontally with a speed of \( 4 \times 10^6 \text{ m/s} \) in a uniform magnetic field of magnitude \( 8 \times 10^{-4} \text{ T} \) acting vertically upward. The radius of its circular path is,CUET 2025 Easy
- If a copper rod carries a direct current, the magnetic field due to it will be:CUET 2023 Easy
- What is the approximate earth's dipole moment, if the earth's magnetic field at the Equator is approximately 0.5 G and diameter is \( 15.0 \times 10^6 \text{ m} \)?CUET 2023 Medium
- You are sitting in a parked car and you notice a boy running towards the car in the side view mirror of the car. If the boy is running at a constant speed towards you, which option according to you is correctCUET 2025 Medium
- When a number of capacitors are connected in parallel between two points increases, the equivalent capacitanceCUET 2023 Hard
- A plane electromagnetic wave travels in vacuum along y-direction. At the same instant, the direction of Electric and magnetic fields are:CUET 2023 Hard
More PYQs from CUET
- Match List I with List II
Choose the correct answer from the options given below:LIST I LIST II A. Decomposition of \(\text{H}_2\text{O}_2\) I. Second order reaction B. Decomposition of \(\text{H}_2\) in the presence of Hg and light II. Pseudo first order reaction C. Hydrolysis of ester by alkali III. First order reaction D. Hydrolysis of ester in excess of acid IV. Photosensitisation CUET 2023 Easy - In an AC generator, a coil of 20 turns each with area \( 2 \times 10^{-2} \text{ m}^2 \) is rotated at 50 revolutions per sec in a uniform magnetic field of 2.5 T. The maximum induced emf produced is:CUET 2023 Medium
- RNA polymerase III is responsible for the transcription of:CUET 2023 Medium
- The equation of the normal to the curve \(y=4 x^3+2 \sin x\) at \((0,3)\) is :CUET 2023 Hard
- In a Young's double slit experiment, the two parallel slits are 1 mm apart and a screen is placed 1 m away from the slits. When the light of wavelength 600 nm is used, the fringe width isCUET 2025 Easy
- The value of \(\int\left(\frac{1}{\log _e x}-\frac{1}{\left(\log _e x\right)^2}\right) d x\) isCUET 2025 Hard