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120 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Resistance constant |
resistant = rho x length/area |
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Ohm's law |
V = IR |
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Watt |
P = IV P = watt I = amp V= volt |
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Power and energy |
P = E(energy in joules)/t(time) So E = IxVxt |
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Charge |
Q = I x t |
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Volt |
Work done per coulomb |
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Pararell circuit resistant |
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Diode in circuit |
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P = IV |
P powr I ampare C voltage |
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Ferromagnetic |
ตัวบ่งชี้ความเป้นแม่เหล็ก |
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Refraction formula all |
N= refractive index |
Refractive index = Sin I / Sin r ใช้ได้แค่กับอย่างหนึ่งเป้นอากาศ |
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Critical angle definition |
angle of incidence that provides an angle of refraction of 90-degrees. |
Critical angles on occur from denser medium to less dense medium. |
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Ripples tank shallow |
When enter shallow wavelength and speed decrease. Frequency stay constant. |
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When to use left hand rule or right hand rule. |
Find magnetic field of and current in solenoid use right trip rule
In motor use left hand In generator use right hand
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Fleming left hand |
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Scalar vs vector |
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Resistance in pararell |
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Resistance in pararell where every resister have same resustance |
R/n Where n is number of resistance. |
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Pararellogram rule |
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Physic |
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Pararell circuit |
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Real image |
Invert ( up and down, left and right ) can be projected Light ray meet |
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Charge of electron |
1.6x10-¹⁹ |
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Voltage in pararell |
Every branch take full |
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When asked to explain structure of atom |
-Small nucleus sorounded by orbit electron - number of particles -number of proton -number of neutron -number of electron |
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Ray tracing experiment (Reflection) |
-No need for darken room. -Draw thin lines. -Keep one eye closed. -Room temperature isn't important -View the base of the pins |
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Speed of sound |
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Ultrasound |
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Evaporation |
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Refractive index |
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Impulse force |
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So unit of density |
Kg/M³ |
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Explain in term momentum of molecules why increase in temp increase in pressure with constant volume |
-increase in average Ke -Particles move faster -Particles get more momentum P = mV -More force as when hit moment / time = force -More pressure as Pressure = force / area |
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Voltage in pararell |
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Mano meter |
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Absorber and emitter |
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Light (from air)enter glass |
Slowdone |
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Demagnetise |
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Resistance in wire |
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When refracted |
Frequency is always the same |
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Energy = amplitude² × frequency |
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Filament |
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Diode graph |
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What is direction of magnetic field |
the direction of the force that would act on a N pole at that point |
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Current in pararell |
Calculate by V and R |
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Measuring cylinder |
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Thermal radiation |
More emitsion more heat losd |
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Wavelength and diffraction |
The shorter the wavelength the more it diffract. |
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Converging len |
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Speed of light in prism |
Red fastest Violet slowest |
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EMF unit |
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Through |
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Fushion Vs fision |
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Current solenoid |
Look from the current direction. direction of fingers is direction of current and thump is north pole |
นิ้วโป้ง ไปที่ + |
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Wavelength in ripple tank |
From dot line to another dot line. Or line to another |
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Hook law |
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Center of gravity |
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Moment in object with height |
Ignore height only horizontal height affect the moment. Example green line is the length, from pivot use in moment calculation. แรงจะต้องตั้งฉากกับ แขนไปจนถึงpivot |
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Calculate weight and mass |
Use 9.81 for g |
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เวลาอธิบายคลืน |
ใช้คำว่า vibration or ossilation |
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Monochrome |
Have one frequency and wavelength |
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เข็มทิศ |
หันไปตามทางmagnetic field (magnetic field จาก north ไป south) |
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Set square |
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Impulse |
Think with direction |
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Parachute freefall explain |
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Accurate ray trace |
Use small pins Do experiment in dark room |
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Resultant of circular motion |
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Variable supply |
Supply ที่ไม่คงที่ |
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Fix point in thermometer |
0c and 100c |
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Wave diffeaction |
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Critical angle |
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Water wave diffraction |
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Wave in shallow Vs deep |
No change in frequency Speed increase in deeper Speed decrease in shallow Wavelength increase in deep Wavelength decrease in shallow |
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∆Ke = ∆Pe |
MGH = ½MV² |
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Speed of sound |
Doesn't change if medium is the same |
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Convex Len picture size |
ยิ่งใกล้ focus ยิ่งเล็ก |
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Left hand Vs right hand rule |
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Sprint constant unit |
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Magnifying glass |
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Induction stove |
- alternating current in wire induce magnetic field -magnetic field induce current in steel pan -power dissipated create heat |
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Refractive index |
C = velocity in vacumm V = velocity of light in medium |
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Half life decay |
บางทีถาม have decayed ให้ระวังว่าคือตัวที่หายไปไม่ใช่ตัวที่เหลือ (Original-ตัวที่เหลือ) |
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Diffraction at edge |
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เวลาหา kinetic energy work done |
ให้หา initial energy - final energy หามลบตัวความเร็ว : เพราะในสามการ Ke = ½mv² ความเร็วมันกำลังสอง ค่าจะออกมาไม่เหมือนกัน |
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AC vs DC graph |
Dc ก็โค้ฃได้แต่ว่าไม่ปน + - |
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Reflection of wave |
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Diffraction of sound frequency and the wavelegth |
More wavelength diffract more More frequency diffract less |
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Transformer working |
Mention Alternating of magnetic field by AC current And alternating EMF in out-put. |
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Smaller bulb in thermometer |
Make it more sensitive as it decrease thermal capacity of liquid (less volume) Thermal capacity = mass X thermal capacity |
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What properties allow liquid to be used in thermometer |
Expand uniformly |
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Resultant force |
A force that has the effect of all forces acting on an object |
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Momentum is conserved |
Momentum before = momentum after |
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Electric field |
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Magnetic field |
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Potential divider |
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Sanky diagram |
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Work done |
Force X distance ( distance move ) |
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Why do lens have colour edge |
Chromatic aberration happens because your lens acts as a prism. |
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MGH= ½MV² |
GH = ½V² ตัด m ออก |
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Calculating half life |
ลบ BG radiation ออกก่อน พอคำนวนเสร็จใส่กลับเข้าไป เพราะ reading นับ BG radiation ด้วย |
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Time period (wave) |
1/frequency |
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If the incident angle is less than c you get both reflection and refraction |
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Convex len |
Between Len and focus = virtual image show and enlarge, magnify glass
Further from focal point = real image and diminish |
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Prism color |
Red Orange Yellow green Blue indigo Violet |
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Object isn't falling On ground or on pivot |
Downward force = upward force Upward force = force at centre of mass ( force will be at pivot if in the moment topic ) |
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Radiation |
Consider only surface area |
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Wave travel from rock to air can we hear |
Yes no change in frequency |
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Deflection |
วิ่งไปวิ่งกลับ |
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Resistance in wire |
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Time period |
1/frequency |
And frequency = 1/time period |
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Magnetic metal |
Iron steel nickel cobalt |
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Induced magnetism |
Non magnetic material develops magnetism and becomes magnetic material |
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Coulomb |
Use c |
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Rectifier |
Component used to turn ac to dc |
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Speaker |
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Motor effect |
1. Wire carrying current experiences a temporary magnetic field. 2.temporary magnetic fields interact with the permanent magnetic field of the bar magnet. 3.Force is created. |
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Background radiation |
Cosmic ray Rocks X-rays Air |
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Plain mirror diagram |
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Potential divider |
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