Science Quiz 84
{“questions”:{“darjy”:{“id”:”darjy”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”The magnetism left in the iron after exciting field has been removed is known as\r\n”,”desc”:””,”hint”:””,”answers”:{“9elr9”:{“id”:”9elr9″,”image”:””,”imageId”:””,”title”:”Magnetic potential”},”yc6ga”:{“id”:”yc6ga”,”image”:””,”imageId”:””,”title”:”Relative permeability\t”},”uuxik”:{“id”:”uuxik”,”image”:””,”imageId”:””,”title”:”Flux density”},”wmj3f”:{“id”:”wmj3f”,”image”:””,”imageId”:””,”title”:”residual magnetism”,”isCorrect”:”1″}}},”z7q63″:{“id”:”z7q63″,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”The materials having low retentivity are suitable for making\r\n”,”desc”:””,”hint”:””,”answers”:{“9kzqv”:{“id”:”9kzqv”,”image”:””,”imageId”:””,”title”:”heating magnets\t”},”5wqgf”:{“id”:”5wqgf”,”image”:””,”imageId”:””,”title”:”permanent magnets”},”f3ckq”:{“id”:”f3ckq”,”image”:””,”imageId”:””,”title”:”temporary magnets”,”isCorrect”:”1″},”2igr2″:{“id”:”2igr2″,”image”:””,”imageId”:””,”title”:”weak magnets”}}},”0qvtf”:{“id”:”0qvtf”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”Strength of an electromagnet can be increased by\r\n”,”desc”:””,”hint”:””,”answers”:{“aqvme”:{“id”:”aqvme”,”image”:””,”imageId”:””,”title”:”increasing the cross-sectional area”},”82s8l”:{“id”:”82s8l”,”image”:””,”imageId”:””,”title”:”increasing the number of turns”},”zcema”:{“id”:”zcema”,”image”:””,”imageId”:””,”title”:”increasing current supply\t”},”c9ymu”:{“id”:”c9ymu”,”image”:””,”imageId”:””,”title”:”all above methods”,”isCorrect”:”1″}}},”pwdl4″:{“id”:”pwdl4″,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”A magnetic field exists.