Figure 5 shows a bar magnet - AQA - GCSE Physics - Question 3 - 2019 - Paper 1
Question 3
Figure 5 shows a bar magnet.
Each circle represents a compass.
**Figure 5**
Draw an arrow inside each circle to show the direction that each compass would point.
... show full transcript
Worked Solution & Example Answer:Figure 5 shows a bar magnet - AQA - GCSE Physics - Question 3 - 2019 - Paper 1
Step 1
Draw an arrow inside each circle to show the direction that each compass would point.
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
Both arrows should point horizontally and to the right, indicating the direction of the magnetic field.
Step 2
Explain why the magnets inside the coat must not have two south poles facing each other.
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 two south poles would repel each other, preventing the coat from being held together effectively.
Step 3
Which type of rod would make the magnetic field of the coil stronger?
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
The steel rod would make the magnetic field stronger because it is a ferromagnetic material.
Step 4
Determine the increase in the extension of the spring.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The increase in extension of the spring is 1.5 cm, as observed from the graph.
Step 5
Calculate the increase in the force on the spring when the current in the coil increased from 0.6 A to 1.2 A.
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Using the equation: ( F = k \times x ), where ( k = 0.18 ) N/cm and ( x = 1.5 ) cm, the increase in force is calculated as follows: ( F = 0.18 \times 1.5 = 0.27 ) N.
Step 6
Describe what happened to the strength of the electromagnet as the current in the coil increased from 1.2 A to 1.6 A.
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The strength of the electromagnet increases and reaches a maximum as the current increases. Beyond this point, it may not increase further or may stabilize.
