4.1. Simple phenomena of magnetism
A subsection of Physics, 0625, through 4. Electricity and magnetism
Listing 10 of 343 questions
shows a horizontal wire PQ placed in the gap between the N pole and the S pole of a magnet. N S P Q There is a current in the wire in the direction P to Q. A force acts on the current-carrying wire in the magnetic field. On , draw an arrow, labelled M to show the direction of the magnetic field in the gap between the poles of the magnet, an arrow, labelled F to show the direction of the force on the current-carrying wire due to the magnetic field of the magnet. State the effect of reversing the direction of the current in wire PQ. The magnet is removed and the horizontal, current-carrying wire is left on its own, as shown in . P Q On , sketch the pattern of the magnetic field due to the current in the wire. Indicate the field direction. The current in PQ is increased. State the effect of this change in current on the magnetic field. A small magnet is placed at a point where the magnetic field is vertically upwards. State the direction of the force on the S pole of the small magnet. 10 In the space, draw the standard symbol for a light-emitting diode (LED). Table 10.1 shows the truth table for a logic gate. Table 10.1 input 1 input 2 output State the name of the logic gate which has this truth table. It is possible to connect together the two inputs of the gate in . Using two or more of the logic gates in , design a circuit with two inputs and one output which has the truth table shown in Table 10.2. Table 10.2 input 1 input 2 intermediate point, X output Draw your circuit in the space below. There is no need to use the symbol for the logic gate. Boxes with the two inputs and one output are sufficient. Label an intermediate point of your circuit with the letter X. Complete the table with the logic levels for this point in the blank column of the table.
0625_s17_qp_42
THEORY
2017
Paper 4, Variant 2
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Some students plot the magnetic field lines around a bar magnet. They have the apparatus shown in and a large sheet of paper. bar magnet plotting compass pencil Describe how the students use the apparatus in to show the pattern of the magnetic field lines around the bar magnet. You may draw a diagram to assist with your description. Draw at least four lines above and below the bar magnet in to show the magnetic field around the bar magnet. Draw an arrow on the field lines to show the direction of the magnetic field. S N
0625_s20_qp_32
THEORY
2020
Paper 3, Variant 2
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shows a bar magnet on a piece of card. piece of card bar magnet Describe an experiment to determine the pattern of the magnetic field lines around the bar magnet. You may draw on if it helps to explain your answer. A student has a bar magnet and a metal bar with ends labelled X and Y. The student moves the metal bar close to either pole of the bar magnet. and show the force on the metal bar in each case. N S X Y attraction metal bar N S X Y attraction metal bar State and explain what these results reveal about the metal bar XY.
0625_s22_qp_31
THEORY
2022
Paper 3, Variant 1
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Questions Discovered
343