JEE Mains · Physics · STD 12 - 4. Moving charges and magnetism
A rigid square loop of side \(a\) and carrying current \(I_2\) is laying on a horizontal surface near a long current \(I_1\) wire in the same plane as shown in figure. The net force on the loop due to the wire will be
- A Repulsive and equal to \(\frac{{{\mu _0}{I_1}{I_2}}}{{2\pi }}\)
- B Repulsive and equal to \(\frac{{{\mu _0}{I_1}{I_2}}}{{4\pi }}\)
- C Zero
- D Attractive and equal to \(\frac{{{\mu _0}{I_1}{I_2}}}{{3\pi }}\)
Answer & Solution
Correct Answer
(B) Repulsive and equal to \(\frac{{{\mu _0}{I_1}{I_2}}}{{4\pi }}\)
Step-by-step Solution
Detailed explanation
\({{\text{F}}_3}{\text{& }}{{\text{F}}_4}\,{\text{cancel}}\,{\text{each}}\,{\text{other}}{\text{. }}\) \({\text{Force on PQ will be }}{{\text{F}}_1} = {2_B}{\text{Ia}}\) \({\text{ = }}{{\text{I}}_2}\frac{{{\mu _0}{I_1}}}{{2\pi {\text{a}}}}{\text{a}}\)…
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
- A solid sphere of mass \(2\,kg\) is making pure rolling on a horizontal surface with kinetic energy \(2240\,J\). The velocity of centre of mass of the sphere will be \(..........ms ^{-1}\).JEE Mains 2023 Medium
- Assume that protons and neutrons have equal masses. Mass of a nucleon is \(1.6 \times 10^{-27}\,kg\) and radius of nucleus is \(1.5 \times 10^{-15} A ^{1 / 3}\,m\). The approximate ratio of the nuclear density and water density is \(n \times 10^{13}\). The value of \(n\) is \(.................\)JEE Mains 2023 Medium
- Given below are two statements : Statement \(I\) : When speed of liquid is zero everywhere, pressure difference at any two points depends on equation \(\mathrm{P}_1-\mathrm{P}_2=\rho \mathrm{g}\left(\mathrm{h}_2-\mathrm{h}_1\right)\) Statement \(II\) : In ventury tube shown \(2 \mathrm{gh}=v_1^2-v_2^2\) In the light of the above statements, choose the most appropriate answer from the options given below.
JEE Mains 2024 Hard - A body of mass \((5 \pm 0.5) kg\) is moving with a velocity of \((20 \pm 0.4) m / s\). Its kinetic energy will beJEE Mains 2023 Medium
- The waves emitted when a metal target is bombarded with high energy electrons areJEE Mains 2023 Easy
- A sphere of radius \('a'\) and mass \('m'\) rolls along a horizontal plane with constant speed \(v_{0}\). It encounters an inclined plane at angle \(\theta\) and climbs upward. Assuming that it rolls without slipping, how far up the sphere will travel?
JEE Mains 2021 Hard
More PYQs from JEE Mains
- A block of mass \(40 \,kg\) slides over a surface, when a mass of \(4 \,kg\) is suspended through an inextensible massless string passing over frictionless pulley as shown below. The coefficient of kinetic friction between the surface and block is \(0.02\). The acceleration of block is ............ \(ms ^{-2}\) (Given \(g =10 \,ms ^{-2}\).)
JEE Mains 2022 Medium - A simple pendulum with length \(100\,cm\) and bob of mass \(250\,g\) is executing S.H.M. of amplitude \(10\,cm\). The maximum tension in the string is found to be \(\frac{x}{40}\,N\). The value of \(x\) is \(..........\).JEE Mains 2023 Hard
- A radioactive sample decays \(\frac{7}{8}\) times its original quantity in \(15\) minutes. The half-life of the sample is \(......min\)JEE Mains 2022 Medium
- A parallel beam of monochromatic light of wavelength \(600 \mathrm{~nm}\) passes through single slit of \(0.4 \mathrm{~mm}\) width. Angular divergence corresponding to second order minima would be _______ \(\times 10^{-3} \mathrm{rad}\).JEE Mains 2024 Hard
- Let \( (h, k) \) lie on the circle \( C: x^{2}+y^{2}=4 \) and the point \( (2h+1, 3k+2) \) lie on an ellipse with eccentricity \( e \). Then the value of \( \frac{5}{e^{2}} \) is equal to ___ .JEE Mains 2026 Easy
- If \(x \phi(x)=\int_{5}^{x}\left(3 t^{2}-2 \phi^{\prime}(t)\right) d t, x\,>\,-2\), and \(\phi(0)=4\) then \(\phi(2)\) is .... .JEE Mains 2021 Hard