04:34Torque acting on current loops | Moving charges & magnetism | Physics | Khan AcademyKhan Academy India - English301views
10:12Torque on a Current Loop In a Magnetic Field & Magnetic Dipole Moment - PhysicsThe Organic Chemistry Tutor359views
Multiple ChoiceA square loop of wire has a side length of 12 cm and carries a 10 A current. What is the size of its magnetic dipole moment?303views1rank
Multiple ChoiceA single circular loop of wire has a radius of 2.0cm, and carries a current of 4.0 A. What is the maximum torque that could be experienced by this loop due to earth's magnetic field?305views
Textbook QuestionA rectangular loop of wire carries a 2.0-A dc current and lies in a plane which also contains a very long straight wire carrying a 10.0-A current as shown in Fig. 28–58. Determine (a) the net force and (b) the net torque on the loop due to the straight wire. <IMAGE>45views
Textbook Question(II) An iron atom has a magnetic dipole moment of about 1.8 x 10⁻²³ A • m² . (a) Determine the dipole moment of an iron bar 15 cm long, 1.2 cm wide, and 1.0 cm thick, if it is 100 percent saturated. (b) What torque would be exerted on this bar when placed in a 0.80-T field acting at right angles to the bar?42views
Textbook QuestionA motor run by a 9.0-V battery has a 20-turn square coil with sides of length 5.0 cm and total resistance 24 Ω . When spinning, the magnetic field felt by the wire in the coil is 0.020 T. What is the maximum torque on the motor? 14views
Textbook Question(I) If the restoring spring of a galvanometer weakens by 15% over the years, what current will give full-scale deflection if it originally required 25μA?18views
Textbook Question(I) A galvanometer needle deflects full scale for a 63.0-μA current. What current will give full-scale deflection if the magnetic field weakens to 0.700 of its original value?20views
Textbook Question(I) A 13.0-cm-diameter circular loop of wire is placed with the plane of the loop parallel to the uniform magnetic field between the pole pieces of a large magnet. When 3.80 A flows in the coil, the torque on it is 0.185 m • N What is the magnetic field strength? 19views
Textbook Question(I) If the current to an electric motor drops by 18%, by what factor does the output torque change?31views
Textbook Question(I) How much work is required to rotate the current loop (Fig. 27–23) in a uniform magnetic field B (→ above B) from (a) θ = 0° (μ (→ above μ) ∣∣ B (→ above B)) to θ = 180°, (b) θ = 90° to θ = ― 90°4views