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23.31 - Electric Generators Point5:10 What is the Beak emf generated by a 0.235 m radius, 4SOturn coil is rotated onefourth of a revolution in 4.17 ms, originally having its plane perpendicular to a uniform magnetic field of 0.51 T. iThis Is 60 rev/s.) Tries 0/40 23.32 - Electric Generators Points:10 A bicc|e generator rotates at 1940 rad/s, producing an 16.0 V peak emf. It has a 1.40 by 3.60 cm rectangular coil in a 0.520 T field. How many turns are in the coil? Is this number of turns of wire practical for a 1.40 by 3.60 cm coil? 0 Yes (3- No Tries 0/40 23.33 - Electric Generators Points: 30 A bicycle generator consists of 45 rectangular turns that are 1.20 cm by 3.50 cm. The turns rotate in a uniform magnetic field of 0.700 T. The generator is driven by a 1.45 cm diameter wheel that rolls on the outside rim of the bicycle tire. What is the velocity of the bicycle if the generator's angular velocity is 2140 rad/s? Submit Answer | Tries 0/40 What is the maximum emf of the generator when the bicycle moves at 10.1 m/s, noting that it was 28.3 V under the original speed? Submit Answer Tries 0/40 If the sophisticated generator can vary its own magnetic field, what field strength will it need at 5.30 m/s to produce a 14.20 V maximum emf? Submit Answer | Tries 0/4023.34 - Electric Generators Points: 10 A car generator turns at 470 rpm when_the engine is idling. Its 290turn, 5.20 by 6.20 cm rectangular coil rotates _in an_ad'ustable magnetic field so that it can produce sufficient voltage even at low rpms. What is the field strength needed to produce a 23.0 V peak emf? (Discuss how this required fiel strength compares to those available in permanent and electromagnets.) Tries 0/40 Transformer Points:30 What is the voltage output of a transformer used for rechargeable flashlight batteries, if its primary has 450 turns, its secondary 15.00 turns, and the input voltage is 120 V? Tries 0/40 What input current is required to produce a 5.00 A output? Tries 0/40 What is the power input? Tries 0/40 23.49 - Transformers Points:20 A multipurpose transformer has a secondary coil with several points at which a voltage can be extracted, giving outputs of 6.00, 10.5, and 24 V. The input voltage is 115 V to a primary Coll of 240 turns. What are the numbers of turns In the parts of the secondary used to produce the output voltages? NS (for 6-00 V) = Z N. (for 10.5 V) = Z N. (for 24.0 V) = : Tries 0/40 If the maximum in ut current is 2.30 A, what are the maximum output currents (each used alone)? I. (for 6.00 V) = :l 15(f0r10-5 V) = |:| 15(f0r24-0 w = |:I Tries 0/40 23.45 - Transformers Points:20 An American traveler in New Zealand carries a transformer to convert New Zealand's standard 230 V to 120 V so that she can use some small appliances on her trip. What is the ratio of turns in the primary and secondary coils of her transformer? Tries 0/40 What is the ratio of input to output current? (How could a New Zealander traveling in the United States use this same transformer to power her 230 V appliances from 120 V?) Tries 0/40 Transformer Points:20 plaOin transformer, like that in the figure below, supplies 7.50 V to a video game system. How many turns are in its secondary coil, if its input voltage is 120 V and the primary coil as turns. ~st' m p \\ Tries 0/40 What is its input current when its output is 1.30 A? Tries 0/40