Complete Figure 18 to show the magnetic field pattern around the wire - AQA - GCSE Physics - Question 10 - 2018 - Paper 1
Question 10
Complete Figure 18 to show the magnetic field pattern around the wire.
The magnetic flux density 10 cm from the wire is 4 microtesla.
Which of the following is the... show full transcript
Worked Solution & Example Answer:Complete Figure 18 to show the magnetic field pattern around the wire - AQA - GCSE Physics - Question 10 - 2018 - Paper 1
Step 1
10.1 Complete Figure 18
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
To represent the magnetic field pattern around the wire, draw at least three concentric circles around the wire. Ensure that the arrows on the circles indicate the direction of the magnetic field, which is clockwise.
Step 2
10.2 Which of the following is the same as 4 microtesla?
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct equivalent for 4 microtesla is 4 x 10^(-6) tesla.
Step 3
10.3 Explain why the coil rotates continuously
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
When a current flows through the coil, it generates a magnetic field. This interaction causes forces to act on the sides of the coil that are parallel to the external magnetic field, leading to a torque that rotates the coil in either a clockwise or anticlockwise direction.
Each half-revolution involves the commutator swapping the current direction such that the coil continues to experience a force in the same rotational direction. This ensures that the coil keeps rotating continuously without interruption.
