4.5.4. Force on a current-carrying conductor
A subsection of Physics, 0625, through 4. Electricity and magnetism
Listing 10 of 57 questions
10 The apparatus in is called a force-on-conductor balance. When there is an electric current I as shown in XY, there is a force on XY that pulls it down. This force is measured by putting weights in the pan until XY is brought back to its original position. N S current in current out X Y pan I State what would happen if the current direction were from Y to X. An experimenter uses the balance to determine the force F on XY for different currents I. His results are given below. I / A 0.5 1.0 1.5 2.0 F / N 0.012 0.023 0.035 0.047 On the grid of , 1. mark suitable scales to plot a graph of F / N against I / A for these values, 2. plot the points on your grid, 3. draw the best straight line through your points. I / A F / N From your graph, find the force on XY when the current is 1.6 A. force = N Name one common device that uses the effect demonstrated by the force-on-conductor balance.
0625_s09_qp_2
THEORY
2009
Paper 2, Variant 0
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shows a wire, held between the poles of a magnet, carrying a current in the direction of the arrow. current S N On , draw an arrow, labelled F, to show the direction of the force acting on the wire. Explain why the force F acts on the wire. The directions of the current and the magnetic field are both reversed. State the effect on the force F. shows a negatively charged particle travelling, in a vacuum, into a region where a magnetic field acts. The magnetic field, shown by the crosses, is acting into the paper. – P Draw an arrow, labelled F, to show the direction of the force on the particle at point P where it enters the field. Describe the path of the particle as it continues to move through the magnetic field.
0625_s11_qp_32
THEORY
2011
Paper 3, Variant 2
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shows a wire, held between the poles of a magnet, carrying a current in the direction of the arrow. current S N On , draw an arrow, labelled F, to show the direction of the force acting on the wire. Explain why the force F acts on the wire. The directions of the current and the magnetic field are both reversed. State the effect on the force F. shows a negatively charged particle travelling, in a vacuum, into a region where a magnetic field acts. The magnetic field, shown by the crosses, is acting into the paper. – P Draw an arrow, labelled F, to show the direction of the force on the particle at point P where it enters the field. Describe the path of the particle as it continues to move through the magnetic field.
0625_s11_qp_33
THEORY
2011
Paper 3, Variant 3
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Questions Discovered
57