 µ GCSE | Motor Effect

10 quick questions - for GCSE and iGCSE

 10 minutes maximum! (can you do it in 5?) 1. A copper wire has a magnetic field around it if... A. ..it has been magnetised. B. ..there is a current flowing through it. C. ..it is twisted into a coil. D. ..it is heated up. ? A B C D Q 2-4. The diagram below shows a copper wire between 2 magnets. 2. In which direction is the magnetic field? A. N to S B. S to N C. A to B D. B to A ? A B C D 3. A current flows through the wire from A to B. Which way is the wire pushed? A. To the right B. To the left. C. Upwards. D. Downwards. ? A B C D 4. If we want the force on the wire to be reversed, which way must current flow? A. N to S B. S to N C. A to B D. B to A ? A B C D 5. If we want the wire to be pushed to the right, which way must current flow? A. A to B B. B to A C. Use an alternating current. D. This is not possible using a current. ? A B C D Q6-9. The magnets and wire are re-arranged. A current flows in the wire as show by the arrow. 6. Using the left-hand rule, what represents the magnetic field? A. Thumb. B. First finger. C. Second finger. D. Third finger. ? A B C D 7. In which direction will this wire be pushed? A. To the left. B. To the right. C. Upwards. D. Downwards. ? A B C D 8. There are several ways to increase the size of the force on the wire. Which of these will not work? A. use a wire with less mass. B. Increase the current. C. Increase the strength of the magnetic field. D. Increase the length of wire in the field. ? A B C D 9. What could be done to push the wire in the opposite direction, with twice the force? A. Switch the N and S poles of the magnets round. B. Double the current. C. Switch the direction of the current AND the N and S poles. D. Double the current AND switch the N and S poles. ? A B C D 10. This coil of wire has a current flowing through it which makes the coil move. Which way does the coil move? A. To the left. B. To the right. C. Rotates clockwise. D. Rotates anti-clockwise. ? A B C D