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- ...nal mechanics, not here. Before reading this section, ensure that you have a thorough understanding of linear motion, vectors and differentiation. ...tion vector, displacement, velocity and acceleration respectively, we have a few terms in angular motion. ...8 KB (1,364 words) - 08:40, 26 July 2007
- '''2. A sound wave, with a frequency of 44 kHz, has a wavelength of 7.7mm. What is the speed of sound?''' There are 14 other big spikes, plus a few other spikes which may be large enough to be harmonics. ...2 KB (283 words) - 15:55, 28 December 2007
- ...r they found out gravity was very very weak at nuclear levels. Infact it's a million million million million million million times too small. (10^36)<br *A is the number of nucleons ...2 KB (326 words) - 21:47, 9 December 2007
- Thermal physics deals with the changes that occur in substances when there is a change in temperature. When you heat up a material, it may change state. The molecules vibrate with a greater amplitude, and break apart from one another. The material has been ...10 KB (1,666 words) - 03:47, 27 November 2007
- '''1. An image transmitted down a SVGA video cable is 800 pixels wide, and 600 pixels high. How many pixels a '''2. A grayscale image is encoded using 3 bits. How many possible values can each ...2 KB (263 words) - 12:18, 20 December 2007
- '''1. A 9V battery is short-circuited. The potential difference across the battery ...1,018 bytes (146 words) - 17:14, 5 January 2008
- '''1. A 12 kΩ resistor and a 20 kΩ resistor are connected to a 9V battery. A voltmeter is connected across the 12Ω resistor. What is the reading on the ...urns. The wiper is connected to a voltmeter, and the circuit is powered by a 120V power source with negligible internal resistance. What is the reading ...2 KB (267 words) - 16:21, 8 January 2008
- '''1. A lens has a focal length of 10cm. What is its power, in dioptres?''' '''2. Light reflected off a cactus 1.5m from a 20D lens forms an image. How many metres is it from the other side of the l ...2 KB (292 words) - 18:53, 18 February 2008
- 605 bytes (90 words) - 14:42, 31 December 2007
- '''1. A ray of light is reflected from a mirror. Its angle to the normal when it reaches the mirror is 70°. What is '''4. A ray of light passes the boundary between air and a transparent material. The angle of reflection is 20°, and the angle of inci ...2 KB (246 words) - 17:31, 15 December 2007
- '''1. A battery has an EMF of 5V. What is the total potential difference across all '''2. The voltages (relative to the voltage of the battery) on either side of a resistor are -6V and -5V. What is the potential difference across the resis ...744 bytes (139 words) - 16:53, 2 January 2008
- '''1. A broadband internet connection has a bit rate of 8Mbit s<sup>-1</sup> when downloading information. What is the '''2. The same connection has a bandwidth of 100 kHz reserved for uploading information. What is the maximu ...1 KB (217 words) - 00:59, 21 January 2008
- ..., not a material, such as iron) carries an electric current. Resistance is a measure of how well an artefact resists an electric current. ...rent running through the component and the resistance of the component. As a formula: ...4 KB (664 words) - 11:45, 3 January 2008
- ...system which consists of a 9V power supply, a 1.6 kΩ resistor, the LDR and a multimeter which displays voltage to 2 decimal places measuring the potenti ...ltage is split between the 1.6kΩ resistor and the LDR, which currently has a resistance of 2kΩ. Therefore, the potential difference across the LDR is: ...3 KB (493 words) - 14:42, 3 January 2008
- ...ewtonian physics, which is the physics used for objects at the macroscopic level (as viewed with the naked eye). ==Does light behave as a wave or as particles?== ...5 KB (792 words) - 17:12, 24 May 2007
- '''2. What sort of variable resistor would a semiconductor be useful in?''' ...tance of a semiconductor decreases as heat increases (but, assuming use of a potential divider, the voltmeter would have to be on the other resistor). ...616 bytes (96 words) - 14:11, 29 December 2007
- '''1. The potential difference across a 9W light bulb is 240V. How much current is flowing through the light bulb?' <math>I = \frac{9}{240} = 0.0375\mbox{ A}</math> ...1 KB (235 words) - 13:48, 29 December 2007
- That formula involved logarithms. If a<sup>b</sup> = c, then: log<sub>a</sub>c = b ...937 bytes (181 words) - 12:41, 20 December 2007
- '''1. Take samples for the signal below every 0.1ms, and then produce a reconstructed signal. How does it differ from the original?''' '''2. A signal is sampled for 5 seconds at a sampling rate of 20 kHz. How many samples were taken?''' ...1 KB (213 words) - 09:23, 22 December 2007
- '''1. 10 coulombs flow past a point in a wire in 1 minute. How much current is flowing through the point?''' <math>I = \frac{10}{60} \approx 0.17\mbox{ A}</math> ...894 bytes (154 words) - 15:23, 29 December 2007
Page text matches
- See also [[A-level Physics/Symbols for Physical Quantities|Symbols for Physical Quantities]]. *<math> \vec{a} = \frac {\Delta \vec{v}}{\Delta t} = \frac{d \vec{v}}{dt}</math> ...1 KB (236 words) - 18:07, 28 February 2008
- [[Category:A-level Physics|Deformation of solids]] ...433 bytes (54 words) - 15:41, 26 October 2007
- ...first and second fingers to point at 90° to each other: like the corner of a box.<br> [[Category:A-level Physics|Magnetic effects of current]] ...544 bytes (93 words) - 19:09, 10 January 2008
- [[Category:A-level Physics|Reflection and Refraction]] ...645 bytes (101 words) - 14:00, 7 June 2007
- Diffraction is the spreading out of waves as they pass through a narrow gap or obstacle. ...the separation of the light sources (i.e. the separation of the slits), ''a'', the separation of the fringes of the interference pattern, ''x'', the wa ...1 KB (228 words) - 03:02, 17 January 2008
- ...ewtonian physics, which is the physics used for objects at the macroscopic level (as viewed with the naked eye). ==Does light behave as a wave or as particles?== ...5 KB (792 words) - 17:12, 24 May 2007
- ;A ;a ...1 KB (151 words) - 23:18, 20 January 2008
- ...gy or gravitational potential energy of an object. The force moves through a distance, and we say that it does work. The amount of '''work done''' tells ...y may be converted from one form to another, the total amount of energy in a closed system is always constant. ...1 KB (245 words) - 19:52, 25 February 2008
- These simple models are small signal approximations to how a fairly generic diode works. Zener and tunnel diodes are ignored. ...the other direction with infinite resistance. Basically, it operates like a check valve for current. ...7 KB (1,228 words) - 15:10, 26 October 2007
- ...appens when two objects collide, the concept of momentum, and we will take a closer look at Newton's 3 laws of motion. ...ter a collision, an object that is heavier will have a lower velocity than a lighter object in its place, and vice versa. Momentum is conserved for all ...4 KB (548 words) - 14:17, 1 January 2008
- ...gravity. People are always asking other people "What is your weight?" when a physicist might ask the same question as "What is your mass?". ...ed to worry about that right now). There are 1000 g in 1 kg and 1000 kg in a tonne. ...3 KB (482 words) - 08:41, 28 June 2006
- ...dealing with the motion of particles or bodies. It defines movement at the level of position, velocity and acceleration, without incorporating masses and fo ...Of course you also need to review basic algebra, trignometry and calculus. A proper understanding of kinematics require an understanding of vector calcu ...3 KB (434 words) - 05:10, 2 December 2007
- Classically we would talk about a particle at ''x''(''t'') with acceleration ''dx''²/''d''²''t''. I ...''t''. Derivatives with respect to these two variables then differ only by a factor of γ ...3 KB (557 words) - 23:36, 20 January 2008
- ...ually changing polarity, unlike an alternating current (A.C.), but instead a constant direction and rate of flow. D.C currents generally are provided by [[Image:Circuit_Symbols_for_A-level-OCR-Physics_A.png|center|600px]] ...3 KB (490 words) - 13:57, 21 February 2008
- ...to tell you what that meant off the bat unless they had been reading up on physics or the equation itself. To understand what this means, you have to understa ...w, whom everyone listened to and looked up to, particularly because he had a lot of ideas which were pretty groundbreaking at the time, and allowed peop ...4 KB (762 words) - 12:55, 17 June 2007
- '''Atm:''' Atm stands for Atmosphere. This is the atmospheric pressure at sea level. I atm is equal to 101,325 Pascals [[Hydrostatic pressure]] is the pressure due to the [[weight]] of a fluid. ...2 KB (285 words) - 20:21, 1 February 2008
- ====A wire in a magnetic field==== ...f that wire or coil. The magnitude of that voltage is proportional (within a limit) to the strength of the magnetic field, and also the number of turns ...9 KB (1,365 words) - 14:54, 1 February 2008
- All electromagnetic waves travel at the same speed (in a vacuum), and that is the universal constant known as the "Speed of Light," ...the range in which the human eye has evolved to observe. The following is a chart of the wavelengths of visible light. ...3 KB (500 words) - 22:33, 10 January 2008
- ...ions are employed upon them while dealing with them.Vector quantities have a direction associated with them while scalars are treated like simple number The following quantities have a magnitude but no direction associated with them, and are examples of scalar ...6 KB (1,050 words) - 05:45, 5 January 2008
- ...n''' states that a body will remain at rest or move with uniform motion in a straight line unless acted upon by an external force. ...the speed may be constant, but the velocity (speed plus direction which is a vector (link)) does change. ...3 KB (589 words) - 11:58, 28 October 2007