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- A magnetic circuit has a length of 100 cm and cross-sectional area of 5 square cm. The total flux is 10 x 104 webers. The coil has 100 turns and current of 4 amperes. What is the magnetic strength? a. 500 AT/m b. 400 AT/m c. 350 AT/m d. 450 AT/mAn air core toroidal coil has 120 turns, the length is 12 cm and 12 sq. cm in area What is the current required to set up a flux of 1.2x10° weber. What is the current?A magnetic coil produces 100,000 maxwell with 2000 turns and with a current of a 2A. The current is cut-off and the flux collapse in 0.01 sec. What is the average voltage that will appear across the coil?
- A magnetic circuit with a cross-sectional area of 20 cm? is to be operated at 50 Hz from a 120 V rms supply. The number of turns required to achieve a peak magnetic flux density of 1.8 T in the core isAn air gap is usually inserted in magnetic circuits to Increase the flux Prevent saturation Increase m.m.f. None of theseQuestion 9 An air gap is usually inserted in magnetic circuits to Increase the flux None of these Prevent saturation Increase m.m.f.
- A coil of 1000 turns is wound on a core. A current of 1A flowing through the coil creates a core flux of 1mwb. What is the energy stored in the magnetic field.A ferromagnetic core in the shape of a doughnut has a cross-sectional area of 0.11 m2 and an average length of 1.4 m. The permeabil ity of the core is 1.206 × 10-3 Wb/A-t. m. Determine the reluctance of the magnetic circuitA coil is used for producing a flux of 0.24 x 10 webers. If the current flowing in the coil is 2 amp and the coil has 200 turns. the total m.m.f required to produce the flux will be
- Where specifically do you find the strongest field intensity in magnetic field vs distance10. A potential difference of 250 V is applied to a field winding at 15-C and the current is 5 A. What will be the temperature of the winding when current has fallen to 3.91 A applied voltage being constant. Assume temperature coefficient at 15'C is equal to 1/254.5 per °CA rectangular coil of wire has a length of 3 cm and a width of 4 cm. It is in a 0.004 T magnetic field. What is the magnetic flux through the coil if the face of the coil is parallel to the B-field lines? What is the flux if the angle between the face of the coil and the magnetic field is 75°?