The diagram below represents a simplified diagram of an electronic device connected to a light bulb - NSC Technical Sciences - Question 10 - 2023 - Paper 1
Question 10
The diagram below represents a simplified diagram of an electronic device connected to a light bulb.
How would EACH of the changes below affect the brightness of th... show full transcript
Worked Solution & Example Answer:The diagram below represents a simplified diagram of an electronic device connected to a light bulb - NSC Technical Sciences - Question 10 - 2023 - Paper 1
Step 1
10.1 A weaker magnet is used.
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
DECREASE. A weaker magnet reduces the magnetic field strength, resulting in lower induced current and dimmer bulb brightness.
Step 2
10.2 A coil is rotated faster.
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
INCREASE. Rotating the coil faster increases the rate of change of magnetic flux, which induces a higher current and increases the brightness of the bulb.
Step 3
10.3 The number of turns in the coil is increased.
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
INCREASE. Increasing the number of turns enhances the induced voltage due to the greater magnetic flux linkage, leading to a higher induced current and brighter bulb.
