Magnetic Field and Forces

JEE Main Physics · 13 questions

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• A current carrying circular loop of radius 2 cm with unit normal n=(k+ i)/(√2) is placed in a magnetic field, B=B_o(3 i+2 k). If…20268 April, Shift 2 · Q39
• A 5 mg particle carrying a charge of 5 π × 10^-6 C is moving with velocity of (3 i+2 k) × 10^-2 m / s in a region having magnetic…20268 April, Shift 2 · Q48
• 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
• A moving coil of galvanometer when shunted with 2 Ω resistance gives a full scale deflection for a current of 500 mA. When a…20266 April, Shift 2 · Q48
• A small cube of side 1 mm is placed at the centre of a circular loop of radius 10 cm carrying a current of 2 A. The magnetic…20266 April, Shift 1 · Q42
• A particle of charge q and mass m is projected from origin with an initial velocity v=(v_0/(√2) x+v_0/(√2) y). There exists a…20265 April, Shift 2 · Q38
• The charged particle moving in a uniform magnetic field of (3 i+2 j) T has an acceleration (4 i-x/2 j) m / s^2. The value of x is20265 April, Shift 1 · Q49
• A circular coil of radius 2 cm and 125 turns carries a current of 1 A. The coil is placed in a uniform magnetic field of…20264 April, Shift 2 · Q49
• A voltmeter with internal resistance of x Ω can be used to measure upto 20 V. In order to increase its measuring range to 30 V,…20264 April, Shift 1 · Q37
• An insulated wire is wound so that it forms a flat coil with N=200 turns. The radius of the innermost turn is r_1=3 cm, and of…20264 April, Shift 1 · Q41
• A particle having charge 10^-9 C moving in x-y plane in fields of 0.4 j N / C and 4 × 10^-3 k T experiences a force of (4 i+2 j)…20262 April, Shift 2 · Q29
• 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
• 1 μ C charge moving with velocity v=( i-2 j+3 k) m / s in the region of magnetic field B=(2 i+3 j-5 k) T. The magnitude of force…20262 April, Shift 1 · Q48