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A coil P is connected to a cell and a switch - AQA - A-Level Physics - Question 27 - 2020 - Paper 2
Question 27
A coil P is connected to a cell and a switch. A closed coil Q is parallel to P and is arranged on the same axis. Which describes the force acting on Q after the swi... show full transcript
Worked Solution & Example Answer:A coil P is connected to a cell and a switch - AQA - A-Level Physics - Question 27 - 2020 - Paper 2
Step 1
Which describes the force acting on Q after the switch is closed?
Answer
When the switch is closed, current starts flowing through coil P, producing a magnetic field. This generates an induced current in the parallel coil Q due to electromagnetic induction. The force acting on coil Q is short-lived because it is dependent on the changing current in coil P when the switch is first closed. Therefore, the correct description of the force on coil Q is that it is short-lived and directed to the right.