Field of Straight Wires and Circular Arcs

JEE Main Physics · Magnetic Field and Forces · 26 questions, latest first

• A current of 30 A each flows in opposite directions in two conducting wires, placed parallel to each other at a distance of 8 cm.…20266 April, Shift 2 · Q38
• Two identical long current carrying wires are bent into the shapes shown in the following figures. If the magnitude of magnetic…20262 April, Shift 1 · Q39
• The current passing through a conducting loop in the form of equilateral triangle of side 4 √3 cm is 2 A. The magnetic field at…202623 January, Shift 2 · Q37
• An infinitely long straight wire carrying current I is bent in a planer shape as shown in the diagram. The radius of the circular…202621 January, Shift 2 · Q39
• Figure shows a current carrying square loop ABCD of edge length is ' a ' lying in a plane. If the resistance of the ABC part is r…20258 April, Shift 2 · Q39
• A loop ABCDA, carrying current I=12 A, is placed in a plane, consists of two semi-circular segments of radius R_1=6 π m and R_2=4…20253 April, Shift 1 · Q48
• An infinite wire has a circular bend of radius a, and carrying a current I as shown in figure. The magnitude of magnetic field at…202528 January, Shift 2 · Q38
• A current of 5A exists in a square loop of side 1/(√2) m. Then the magnitude of the magnetic field B at the centre of the square…202524 January, Shift 1 · Q49
• Two long parallel wires X and Y, separated by a distance of 6 cm, carry currents of 5A and 4A, respectively, in opposite…202522 January, Shift 2 · Q48
• Two parallel long current carrying wire separated by a distance 2 r are shown in the figure. The ratio of magnetic field at A to…20244 April, Shift 2 · Q54
• A regular polygon of 6 sides is formed by bending a wire of length 4 π meter. If an electric current of 4 π √3 A is flowing…20241 February, Shift 1 · Q57
• Two circular coils P and Q of 100 turns each have same radius of π cm. The currents in P and R are 1 A and 2 A respectively. P…202431 January, Shift 2 · Q57
• The current of 5 A flows in a square loop of sides 1 m is placed in air. The magnetic field at the centre of the loop is X √2 ×…202430 January, Shift 2 · Q57
• Two insulated circular loop A and B of radius 'a' carrying a current of 'I' in the anti clockwise direction as shown in the…202430 January, Shift 1 · Q42
• The magnetic field at the centre of a wire loop formed by two semicircular wires of radii R_1=2 π m and R_2=4 π m, carrying…202427 January, Shift 2 · Q57
• Two long, straight wires carry equal currents in opposite directions as shown in figure. The separation between the wires is 5.0…202427 January, Shift 1 · Q57
• A straight wire carrying a current of 14 A is bent into a semicircular arc of radius 2.2 cm as shown in the figure. The magnetic…202310 April, Shift 2 · Q59
• Two identical circular wires of radius 20 cm and carrying current √2 A are placed in perpendicular planes as shown in figure. The…20236 April, Shift 1 · Q57
• As shown in the figure, a long straight conductor with semicircular arc of radius (π)/10 m is carrying current I=3 A. The…20231 February, Shift 2 · Q12
• Find the magnetic field at the point P in figure. The curved portion is a semicircle connected to two long straight wires.20231 February, Shift 1 · Q9
• A long conducting wire having a current I flowing through it, is bent into a circular coil of N turns. Then it is bent into a…202331 January, Shift 2 · Q7
• As shown in the figure, a current of 2 A flowing in an equilateral triangle of side 4 √3 cm. The magnetic field at the centroid O…202330 January, Shift 2 · Q12
• The electric current in a circular coil of four turns produces a magnetic induction 32 T at its centre. The coil is unwound and…202329 January, Shift 2 · Q13
• The magnitude of magnetic induction at mid point O due to current arrangement as shown in Fig will be202329 January, Shift 1 · Q5
• Two long parallel wires carrying currents 8 A and 15 A in opposite directions are placed at a distance of 7 cm from each other. A…202325 January, Shift 2 · Q24
• Match List I with List II & \\ A. & I. B_0=(μ_0 I)/(4 π r)[π+2] \\ B. & II. B_0=(μ_0)/4 I/r \\ C. & III. B_0=(μ_0 I)/(2 π r)[π-1]…202325 January, Shift 1 · Q12