iGCSE Physics (0625)-Unit 4. Electricity and magnetism-4.6.1 Electromagnetic induction- Paper 4

Question

Fig. 7.1 shows a horizontal conducting wire XY between two opposite magnetic poles. Wire XY forms a circuit with an ammeter                                       

1. 1. Explain why the reading on the ammeter is zero when the wire XY is not moving.   [1]

   2. The wire XY is moved and there is a deflection on the ammeter that indicates there is a current in the wire from X to Y.

      On Table 7.1, tick one box to indicate the direction of the movement of the wire XY and explain your answer.

      Table 7.1

      into page	out of page	to the left	to the right	to the bottom of the page	to the top of the page

      explanation :           [3]

   3. State what is observed on the ammeter when the wire XY is moved

      1. in the opposite direction to part (b) ……………………………………………………………………..             [1]

      2. in the same direction as part (b) but at a greater speed ……………………………………………            [1]                                                                                                                                                                                                                                                                       [Total: 6]