Welcome! My name is Cyril, and today we’ll be tackling some of the most likely Physics questions for the 2025 GAOKAO (China’s National College Entrance Exam).
This tutorial breaks down important concepts such as circular motion, magnetic induction, and wave behavior using simple formulas and real GAOKAO-style questions.
Let’s dive in!
You can watch the full class in the video below:
Question 1: Period of a Satellite in Circular Orbit
Question:
A satellite moves in a circular orbit of radius rrr around a planet. If its speed is vvv, what is the period of the revolution?
Solution:
We know that: Speed=DistanceTime\text{Speed} = \frac{\text{Distance}}{\text{Time}}Speed=TimeDistance
In circular motion, the distance covered in one revolution is the circumference of the circle: Distance=2πr\text{Distance} = 2\pi rDistance=2πr
Therefore, the period TTT is: T=2πrvT = \frac{2\pi r}{v}T=v2πr
Correct Option: A – 2πrv\frac{2\pi r}{v}v2πr
Question 2: Induced EMF in a Moving Conductor
Question:
A conducting rod of length lll moves with velocity vvv perpendicular to a magnetic field BBB. What is the induced electromotive force (EMF) between the ends of the rod?
Solution:
According to Faraday’s Law of Electromagnetic Induction, when a conductor moves perpendicularly through a magnetic field, the induced EMF is given by: EMF=B⋅v⋅l\text{EMF} = B \cdot v \cdot lEMF=B⋅v⋅l
Where:
- BBB is magnetic field strength
- vvv is velocity
- lll is length of the conductor
Correct Option: A – BVLBVLBVL
Question 3: Young’s Double Slit Experiment – Wavelength & Fringe Spacing
Question:
In a Young’s Double Slit experiment, increasing the wavelength of light used will cause the fringe spacing to:
Solution:
Fringe spacing in a Young’s experiment is given by: Δy=λDd\Delta y = \frac{\lambda D}{d}Δy=dλD
Where:
- λ\lambdaλ is the wavelength
- DDD is the distance between slits and screen
- ddd is the distance between slits
So, increasing λ\lambdaλ (wavelength) increases Δy\Delta yΔy (fringe spacing).
Correct Answer: Increase
Watch more educational videos and past questions: https://youtube.com/@allcbts
Why These Questions Matter
These formulas and topics frequently appear in GAOKAO Physics and are essential for scoring well. Mastering them will help you:
- Solve complex numerical problems faster
- Understand real-world applications
- Tackle both objective and reasoning questions confidently
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Keywords
Description:
Prepare for GAOKAO Physics 2025 with this complete tutorial. Learn how to solve satellite motion, induced EMF, and wave interference questions. Includes formulas, explanations, and correct options.
Top Keywords:
GAOKAO 2025 Physics, Top Physics Questions GAOKAO, Circular motion GAOKAO, Induced EMF BVL, Young’s Double Slit GAOKAO, Faraday’s Law China, Physics formula cheat sheet.