q1Text=" 1. How many poles a magnet has? 1a. Two: East pole and West pole. 1b. Two: North pole and South pole. 1c. Four: North pole, South pole, East pole and West pole. "; q1Feedback =[ "That’s not correct. Try again.", "Correct!", "That’s not correct. Try again." ]; q2Text=" 2. 2. What is the direction of the magnetic field lines around a magnet? 2a. From the North pole to the South pole of the magnet 2b. From the South pole to the North pole of the magnet. "; q2Feedback =[ "Correct!", "That’s not correct. Their direction is opposite." ]; q3Text=" 3. How is the magnetic needle of a compass oriented along the field lines of a magnet? 3a. The magnetic needle is oriented vertical to the field lines, with its North pole directed towards the magnet 3b. The magnetic needle is oriented parallel to the field lines, with its North pole directed towards the North pole 3c. The magnetic needle is oriented parallel to the field lines, with its North pole directed towards the South pole "; q3Feedback =[ "No. The magnetic needle is oriented parallel to the field lines", "No. Try again.", "Correct!" ]; q4Text=" 4. Why is the North pole of the magnetic needle directed towards the South pole of the magnet? 4a. Because the same poles of magnets are attracted. 4b. Because the opposite poles of magnets are attracted. 4c. Because the opposite poles of magnets are repelled. "; q4Feedback =[ "That’s not correct. Try again.", "Correct!", "That’s not correct. Try again." ]; q5Text=" 5. Why is the magnetic needle of a compass oriented to a North-South direction on Earth? 5a. Because the magnetic field of Earth has an East-West direction. 5b. Because the magnetic field of Earth has a North-South direction. "; q5Feedback =[ "That’s not correct. A magnet is always oriented parallel to a magnetic field.", "Correct!" ]; q6Text=" 6. What is the source of a magnetic field? 6a. Every electric charge produces a magnetic field. 6b. Every motion of an electric charge produces a magnetic field. 6c. Only the motion of many electric charges produces a magnetic field. "; q6Feedback =[ "That’s not correct. A static electric charge does not produce a magnetic field.", "Correct! ", "That’s not correct. One charge is sufficient for the production of a magnetic field." ]; q7Text=" 7. What is the shape of a magnetic field produced by the electric current? 7a. The magnetic field lines are straight lines parallel to the electric current. 7b. The magnetic field lines are straight lines vertical to the electric current. 7c. The magnetic field lines are circular lines around the electric current. "; q7Feedback =[ "That’s not correct.", "That’s not correct.", "Correct! " ];