{"type":"multi-choice","id":"73893","dataJson":{"key":0,"prompt":"Is the following statement True or False? When magnetic field lines are closer together, the magnetic field is weaker.","options":[{"key":"0.479749721966756","label":"True","value":"True"},{"key":"0.8263970644314754","label":"False","value":"False"}],"limitChoices":{"max":1,"min":1},"validResponse":["False"]}}

{"type":"fill-in-blanks","id":"73894","dataJson":{"key":3,"prompt":"Fill out the blanks","options":{"north":[{"label":"north","value":"north"},{"label":"south","value":"south"}],"south":[{"label":"north","value":"north"},{"label":"south","value":"south"}]},"template":"Complete the following sentence: The arrows on magnetic field lines are always drawn as if they are moving from the {{north}} pole to the {{south}} pole.","validResponse":{"north":"north","south":"south"}}}

{"type":"multi-choice","id":"73895","dataJson":{"key":12,"prompt":"Which of the following items can be used to visualise magnetic field lines?","options":[{"key":"0.2857394503191081","label":"Iron Filings","value":"Iron Filings"},{"key":"0.7328274095523861","label":"Wood Chippings","value":"Wood Chippings"},{"key":"0.822585563146192","label":"Plotting Compasses","value":"Plotting Compasses"},{"key":"0.18285202655844257","label":"Copper Wire","value":"Copper Wire"}],"limitChoices":{"max":2,"min":2},"validResponse":["Iron Filings","Plotting Compasses"]}}

{"type":"multi-choice","id":"73896","dataJson":{"key":14,"prompt":"Which of the following words best describes magnetic fields?","options":[{"key":"0.5293953598721512","label":"Visible","value":"Visible"},{"key":"0.5386946510316866","label":"Imaginary","value":"Imaginary"},{"key":"0.16862967445159127","label":"Invisible","value":"Invisible"}],"limitChoices":{"max":1,"min":1},"validResponse":["Invisible"]}}

{"type":"multi-choice","id":"73897","dataJson":{"key":4,"prompt":"When would two magnets repel each other?","options":[{"key":"0.8331750820917183","label":"When two opposite poles face each other ","value":"When two opposite poles face each other "},{"key":"0.23740989301189663","label":"When a north pole and north pole are close together","value":"When a north pole and north pole are close together"},{"key":"0.2519678887454495","label":"When a north pole and a south pole are close together ","value":"When a north pole and a south pole are close together "},{"key":"0.03497940068827177","label":"When a south pole and a south pole are close together ","value":"When a south pole and a south pole are close together "}],"limitChoices":{"sameNumberAsCorrectAnswers":true},"validResponse":["When a north pole and north pole are close together","When a south pole and a south pole are close together "]}}

Answer incorrect

Look at the slide below to work out the answer.