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Biot-Savart Law: Straight Wires and Arcs for JEE: 40 solved questions

Real JEE paper questions on biot-savart law: straight wires and arcs, part of moving charges and magnetism. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2007 to 2026. No sign-in needed to read them.

What this topic asks

• Straight wire segments — 25 questions
• Arcs and combined shapes — 15 questions

All 40 questions with solutions

• Two identical long current carrying wires are bent into the shapes shown in the following figures. If the mag… JEE Main 2nd April 1st Shift 2026
• An infinitely long straight wire carrying current I is bent in a planar shape as shown in the diagram. The ra… JEE Main 21st Jan 2nd Shift 2026
• An infinite wire has a circular bend of radius a, and carries a current I as shown in figure. The magnitude o… JEE Main 28th Jan 2nd Shift 2025
• Find the magnetic field at the point P in figure. The curved portion is a semicircle connected to two long st… JEE Main 1st Feb 1st Shift 2023
• As shown in the figure, a long straight conductor with a semi-circular arc of radius π/(10) m is carrying cur… JEE Main 1st Feb 2nd Shift 2023
• Match List I (current configuration) with List II (magnitude of magnetic field at point O). List I: (A) Long… JEE Main 25th Jan 1st Shift 2023
• A hairpin like shape as shown in figure is made by bending a long current carrying wire. What is the magnitud… JEE Main 17th March 2nd Shift 2021
• A wire A, bent in the shape of an arc of a circle, carrying a current of 2 A and having radius 2 cm and anoth… JEE Main 4th Sept 1st Shift 2020
• A very long wire ABDMNDC is shown in figure carrying current I. AB and BC parts are straight, long and at rig… JEE Main 8th Jan 2nd Shift 2020
• A current loop, having two circular arcs joined by two radial lines is shown in the figure. It carries a curr… JEE Main 9th Jan 1st Shift 2019
• Two identical wires A and B, each of length l, carry the same current I. Wire A is bent into a circle of radi… JEE Main 2016
• Directions: Questions 69 and 70 are based on the following paragraph. A current loop ABCD is held fixed on th… JEE Main 2009
• A loop ABCDA, carrying current I=12 A, is placed in a plane, consists of two semi-circular segments of radius… JEE Main 3rd April 1st Shift 2025
• The magnetic field at the centre of a wire loop formed by two semicircular wires of radii R₁=2π m and R₂=4π m… JEE Main 27th Jan 2nd Shift 2024
• A straight wire carrying a current of 14 A is bent into a semicircular arc of radius 2.2 cm as shown in the f… JEE Main 10th April 2nd Shift 2023
• A current of 30 A each flows in opposite directions in two conducting wires placed parallel to each other at… JEE Main 6th April 2nd Shift 2026
• The current passing through a conducting loop in the form of an equilateral triangle of side 4√3 cm is 2 A. T… JEE Main 23rd Jan 2nd Shift 2026
• Figure shows a current carrying square loop ABCD of edge length a lying in a plane. If the resistance of the… JEE Main 8th April 2nd Shift 2025
• An element Δl⃗=Δ x ı̂ is placed at the origin and carries a large current I=10 A. The magnetic field on the y… JEE Main 6th April 1st Shift 2024
• As shown in the figure, a current of 2 A flows in an equilateral triangle of side 4√3 cm. The magnetic field… JEE Main 30th Jan 2nd Shift 2023
• A current of 1.5 A is flowing through a triangle, of side 9 cm each. The magnetic field at the centroid of th… JEE Main 31st Aug 2nd Shift 2021
• There are two infinitely long straight current carrying conductors and they are held at right angles to each… JEE Main 1st Sept 2nd Shift 2021
• Magnitude of magnetic field (in SI units) at the centre of a hexagonal shape coil of side 10 cm, 50 turns and… JEE Main 3rd Sept 1st Shift 2020
• Two very long, straight, and insulated wires are kept at 90° angle from each other in xy-plane as shown in th… JEE Main 8th April 2nd Shift 2019
• The magnitude of the magnetic field at the center of an equilateral triangular loop of side 1 m which is carr… JEE Main 10th April 2nd Shift 2019
• Find the magnetic field at point P due to a straight line segment AB of length 6 cm carrying a current of 5 A… JEE Main 12th April 2nd Shift 2019
• As shown in the figure, two infinitely long, identical wires are bent by 90° and placed in such a way that th… JEE Main 12th Jan 1st Shift 2019
• A current of 1 A is flowing on the sides of an equilateral triangle of side 4.5×10⁻² m. The magnetic field at… JEE Main Online 2018
• A current i is flowing in a straight conductor of length L. The magnetic induction at a point on its perpendi… JEE Main Online 2013
• Two long parallel wires are at a distance 2d apart. They carry steady equal currents flowing out of the plane… JEE Main 2010
• A horizontal overhead powerline is at a height of 4 m from the ground and carries a current of 100 A from eas… JEE Main 2008
• Two identical conducting wires AOB and COD are placed at right angles to each other. The wire AOB carries an… JEE Main 2007
• Two long parallel wires X and Y, separated by a distance of 6 cm, carry currents of 5 A and 4 A respectively,… JEE Main 22nd Jan 2nd Shift 2025
• A current of 5 A exists in a square loop of side 1/(√2) m. Then the magnitude of the magnetic field B at the… JEE Main 24th Jan 1st Shift 2025
• Two parallel long current carrying wires separated by a distance 2r are shown in the figure. The ratio of mag… JEE Main 4th April 2nd Shift 2024
• A regular polygon of 6 sides is formed by bending a wire of length 4π meter. If an electric current of 4π√3 A… JEE Main 1st Feb 1st Shift 2024
• Two long, straight wires carry equal currents in opposite directions as shown in figure. The separation betwe… JEE Main 27th Jan 1st Shift 2024
• The current 5 A flows in a square loop of sides 1 m is placed in air. The magnetic field at the centre of the… JEE Main 30th Jan 2nd Shift 2024
• Two long parallel wires carrying currents 8 A and 15 A in opposite directions are placed at a distance of 7 c… JEE Main 25th Jan 2nd Shift 2023
• Two long current carrying conductors are placed parallel to each other at a distance of 8 cm between them. Th… JEE Main 29th June 2nd Shift 2022