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headphones?","back":"A small diaphragm replaces the large cone.","mcqOptions":null},{"id":"5a2f3b5e-41f2-4696-b3e3-1a56c2a4373b","cardType":"cloze","points":null,"front":"A loudspeaker converts variations in [ ] into variations in force.","back":"A loudspeaker converts variations in current into variations in force.","mcqOptions":null},{"id":"03c8b402-24eb-4f02-89d1-c63c826eaa6e","cardType":"cloze","points":null,"front":"The varying current produces a changing force through the [ ].","back":"The varying current produces a changing force through the motor effect.","mcqOptions":null},{"id":"154fd3c4-901d-41e5-bd65-3aac82e665b5","cardType":"cloze","points":null,"front":"The moving cone or diaphragm produces [ ] in the air.","back":"The moving cone or diaphragm produces pressure variations in the air.","mcqOptions":null},{"id":"05eb4e8c-0104-49cb-9b2b-a2bdcbfcd0fc","cardType":"cloze","points":null,"front":"In headphones, the coil and [ ] move backwards and forwards.","back":"In headphones, 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