Mammoth Physics
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Physics formulas
Mass/Weight
Gas Laws
Series and Parallel Circuits
Electricity
Magnets and electromagnetism
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Magnets
- Magnets attract or repel
- Have you got a magnet?
- Proving which way magnetic lines on a magnet travel
- Earth's magnetic field and compasses
- Creating a compass from a magnet
- Do both poles of a magnet attract a paperclip?
- Manufacturing permanent magnets
- Can I keep cutting a magnet in half?
- Remember which way magnetic field lines on a magnet travel
- How to demagnetise a magnet
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Electromagnetism
- Define electromagnetism
- Which way does a compass point in an electromagnetic field with one wire?
- The right-hand grip rule of electromagnetism
- Do iron filings stick to wires?
- Magnets create electricity
- One wire vs multiple wires (induction)
- Learn the word induction
- Fleming's left-hand rule and Fleming's right-hand rule
- The difference between an ammeter and galvanometer
- Galvanometer
- Fleming's right-hand rule (induction)
- Fleming's right-hand rule: the mnemonic picture
- What would happen to the rod if the wire was moved in the opposite direction?
- What would happen if the magnets were turned upside down?
- What would happen if you moved the wire from north to south pole?
- Fleming's left-hand rule
- Fleming's left-hand rule: the mnemonic picture
- What would happen to the rod if the current were reversed?
- What would happen to the rod if the magnet were turned upside down?
- What would happen to the rod if both the current and the magnetic field were reversed?
- What would happen to the rod if the magnetic field was stronger?
- Section through a wire: electric flow convention
- Motor effect
- Detailed magnetic field of a wire between two opposing magnetic poles
- How to make an electromagnet
- Strength of an electromagnet (number of coils)
- Strength of an electromagnet (larger battery)
- Which end of an electromagnet is north
- Uses of electromagnetism
- The difference between an electromagnet and a solenoid
- Detailed magnetic field around a solenoid
- Causing an electrical current in a solenoid
- Lenz's law definition
- Plotting all the magnet and solenoid wire configurations
- Inducing an electric current in a single loop
- Drop a magnet through a solenoid
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Electric motors
- Define motor
- An electric coil between two magnets
- How to enable a wire to keep rotating
- Electric commutator – definition
- Using a commutator
- Armature
- How to change an electric coil into a motor
- Using a shaft to drive a wheel
- How to make the motor turn the other way
- Increase the force of the motor
- Brushless DC motor
- How to make a simple electric motor
Refraction
- Refraction definition
- Normal line – Flat surfaces
- Refraction – air to water or glass
- Refraction – water or glass to air
- Refraction Mnemonic
- Light passing through a glass brick
- Refraction and spearing a fish
- Refraction and spitting fish
- Refraction and straws
- Angle of incidence and angle of refraction
- Broken pencil
- Snell's law
- Snell's law is a ratio
- Snell's law in use
- Different refractive indices
- Snell's law applies to velocity
- Total internal reflection – slow to fast
- Working out the critical angle
- Small critical angle = high refractive index
- Why total internal reflection is always slow to fast
- Part reflection part refraction
- How to find the critical angle in an experiment
- Diamonds and total internal reflection
- Total internal reflection experiments and optical fibres
- Medical use of optical fibres
- Refraction use – bicycle reflectors
Myopia and hyperopia (short and long sight)
Newton's laws of motion
Transformers
Lenses
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Convex lenses
- Convex lens
- Convex lenses and centre of curvature
- Convex lens radius of curvature (R)
- Convex lens principal axis
- Spelling principal and lens
- Convergent rays of light - Convex lens
- Normal line - Convex lens
- Refraction and convex lenses
- Rough surfaces
- One point many rays
- Principal focal point (two of them)
- Which is the principal focus (convergence) point
- Principal focal length
- Principal focal length be careful
- Method for drawing ray diagrams - convex lens
- Object distance and image distance
- Practical ways to find the principal focal length magnifying glasses
- Practical ways to find the principal focal length light - box
- Light box and oblique parallel rays
- Practical ways ways to find the principal focal length - lens equation
- Approximate ways to find the principal focal length
- Principal focal length and centre of curvature
- Principal focus point and refractive index (`n`)
- Real images versus virtual images - convex lens
- Can a real image be seen with the naked eye?
- Convex lens - Object at more than 2F
- Convex lens - Object at 2F
- Convex lens - Object between 2F and F
- Convex lens - Object at F
- Convex lens - Object between lens and F
- Summary ray diagrams
- Convex lenses - What to do in an exam
- Object passes through principal axis
- Convex lens and objects larger than the lens
- Convex lens use - Magnifying glass
- Convex lens use - Microscope
- Convex lens use - Telescope
- Convex lens use - Binoculars
- Convex lens use - Glasses
- Convex lens uses - Camera
- Convex lenses and the lens equation
- Examples using lens equation
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Concave lenses
- Concave lens
- Concave lenses – Centre of curvature
- Concave lens – Radius of curvature (R)
- Concave lens – Principal axis
- Divergent rays of light – Concave lens
- Normal line – Concave lens
- Refraction concave lens
- Rough surfaces
- Concave lens – One point many rays
- Concave lens – Principal focal point (two of them)
- Which is the principal focal divergent point?
- Concave lens – Principal focal length
- Concave lens: Principal focal length – be careful
- Method for drawing ray diagrams – Concave lens
- Object distance and image distance – Concave lens
- Practical ways to find the principal focus length – Pins
- Practical ways to find focal length – Concave lens light box
- Light box and oblique parallel rays – Concave lens
- Practical ways to find the principal focal length of a concave lens using a convex lens
- Concave lens – Principal focal length and centre of curvature
- Principal focal point and refractive index
- Real images versus virtual images – Concave lens
- Concave lenses – What can your eye see
- Concave lens – Object at different distances from the lens
- Concave lens – Object passes through principal axis
- Concave lens and objects larger than the lens
- Concave lens use – Galileo's telescope
- Concave lens use – Peephole or door viewer or spy hole
- Concave lens use – Glasses
- Lens equation – Concave lens
- Lens equation – Concave lens and examples
Mirrors
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Convex Mirrors
- Convex mirrors
- Convex mirrors and centre of curvature
- Convex mirrors and vertex
- Convex mirrors: radius of curvature
- Convex mirrors: principal axis
- Divergent rays of light - Convex mirrors
- Normal line - Convex mirrors
- Reflection convex mirrors
- Rough surfaces
- Convex mirrors - One point many rays
- Convex mirrors - All round vision
- Principal focal point - Convex mirror
- Which is the principal focal point - Convex mirror
- Principal focal length - Convex mirrors
- Centre of curvature - Convex mirrors
- Practical ways to find the principal focal length - Spherometer
- Real image versus virtual image - Convex mirror
- Using flat mirror ray diagram rules for convex mirrors
- Using the law of reflection - Ray diagram rules
- Convex mirror - Ray diagram rules
- Summary method for drawing ray diagrams - Convex mirror
- Object doesn't touch the principal axis
- Object distance and image distance - Convex mirrors
- Moving the object distance
- Summary of virtual images formed by convex mirrors
- Laterally inverted convex mirror
- Summary ray diagrams convex mirror
- Object passes through the principal axis
- Convex mirrors and objects larger than the mirror
- Convex mirrors use - Car mirrors
- Convex mirrors use - Security
- Convex mirror use - To avoid collisions
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Flat Mirrors
- How to draw a mirror
- The three laws of reflection
- Do the three laws of reflection make sense?
- Any mirror obeys the three laws of reflection
- Normal line - Flat mirrors
- Normal line - Tilted flat mirrors
- Normal line and two flat mirrors at right angles
- Using the law of reflection
- Using flat mirrors ray diagram rules
- Ray diagrams flat mirror rules summary
- Flat mirror, tilted, ray diagram
- Flat mirrors - Who can see whom - People in a line
- Flat mirrors - Who can see whom - People random
- Where can an observer see a reflected image?
- How much of an object can an observer see
- Shortest mirror to see full length of your body
- Mirror experiment - Shortest mirror
- Laterally inverted
- Parallax
- To remember the word parallax
- Plane mirrors and parallax experiment