Define a motor - NSC Technical Sciences - Question 10 - 2024 - Paper 1
Question 10
Define a motor.
Electric machine that converts electrical energy into mechanical energy.
Write down the NAME of the component labelled 1.
Armature.
When the motor ... show full transcript
Worked Solution & Example Answer:Define a motor - NSC Technical Sciences - Question 10 - 2024 - Paper 1
Step 1
Define a motor.
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
A motor is an electric machine that converts electrical energy into mechanical energy.
Step 2
Write down the NAME of the component labelled 1.
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 component labelled 1 is called the armature.
Step 3
Give a reason why component 1 begins to rotate.
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
Component 1 begins to rotate because a current carrying conductor in the presence of a magnetic field experiences a force, resulting in motion.
Step 4
In which direction will component 1 rotate? Write ANTICLOCKWISE or CLOCKWISE.
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
Component 1 will rotate ANTICLOCKWISE.
Step 5
Sketch a graph of an AC circuit for ONE complete cycle.
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
The graph of an AC circuit shows voltage oscillating in a sinusoidal manner over time, representing one complete cycle of alternating current.
Step 6
State Faraday's law of electromagnetic induction in words.
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
Faraday's law states that the magnitude of the induced electromotive force (emf) in a coil is directly proportional to the rate of change of the magnetic flux through the coil.
Step 7
Calculate the magnitude of the induced emf for the coil.
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
The magnitude of the induced emf can be calculated using the formula:
ext{emf} = -N rac{ riangle ext{Φ}}{ riangle t}
where:
N is the number of turns (300),
riangleextΦ is the change in magnetic flux (3.21×104Wb−5×104Wb=−1.79×104Wb),
