R resistivity - Samenvattingen, Aantekeningen en Examens

2 © OCR 2023 Section A You should spend a maximum of 25 minutes on this section. Write your answer to each question in the box provided. 1 What is a typical value, in cm, for the wavelength of microwave radiation? A 0.0003 B 0.03 C 3 D 300 Your answer [1] 2 The diagrams show four systems of forces with three forces acting at a single point. The forces are in the same plane. The diagrams are drawn to scale. Which system could be in equilibrium? A B C D Your answer [1] 3 © O...

Area of a circle - ANSWER-Pi times radius squared Area of a rectangle - ANSWER-Length times width Current decrease - ANSWER-Voltage decreases if resistance stays the same Current increase - ANSWER-Voltage increases resistance stays the same Faraday's law - ANSWER-The mass of a substance altered I am electrode during electro sis is directly proportional to the quantity of electricity transferred at the electrode Faraday's law formula - ANSWER-M = K x l x t Ohm's law - ANSWER-...

g by free-fall method ANSWER : - Drop object using electromagnet - Measure time and distance - Use suvat to get g mnemonic for exam questions ANSWER : Syllables of experiment e = equation p = procedures i = improvements m = math analysis g by free-fall light gate vs stopwatch ANSWER : light gate prevents human reaction time random errors stop watches rely on human reaction time Light gates will have a smaller percentage uncertainty g by free-fall problems with air resistance A...

Formula for possible stereoisomers - correct answer 2^n If Q > Ksp.... - correct answer Precipitate will form Which way do electric field lines point? - correct answer Exit from positive and enter at negative Reducing sugar - correct answer Sugars which undergo mutorotation, in which the process of ring opening occrus at the hemiacetal group, and the intermediate is a aldehyde Fatty acid structure - correct answer Consists of hydrocarbon tail and carboxylic acid What ...

What's the equation for the volume of the cylinder? Correct Answer: V (volume)= pi multiplied by R squared multiplied by the height Example: radius is 6" height is 30 V=3.1416•6•6•30 A drill draws a current (I) of 4.5 amps and resistance of 16.0 ohms, how do You find the power(watts)? Correct Answer: P=I squared (amps) multipled by R(resistance) Example:P=4.5•4.5•16.0 4.5•4.5=20.25 20.25•16.0=324 P=324 What is the equation for distance? Correct Answer: D=R•T D...

Coulter principle. - Answer-The ability to count and measure the size of particles using an electric circuit. Particles are moved through a small aperture, their presence causes a narrowing of the aperture, which leads to an increase in resistance.By using constant I, According to Ohms law (U= I * R), when R increases, U increases and pulse is generated. Parts and functions of the Coulter-counter - Answer-- Two spaces with a small aperture in between, capillary (contains the electrolyte sol...

Coulter principle. - Answer-The ability to count and measure the size of particles using an electric circuit. Particles are moved through a small aperture, their presence causes a narrowing of the aperture, which leads to an increase in resistance.By using constant I, According to Ohms law (U= I * R), when R increases, U increases and pulse is generated. Parts and functions of the Coulter-counter - Answer-- Two spaces with a small aperture in between, capillary (contains the electrolyte sol...

Equation for the number of stereoisomers and chiral centers # of stereoisomers=2^n n=chiral centers What does the direction of the electric field line represent? The movement of a positive test charge Oligodendrocytes and Schwann cells Produces myelin sheaths in the CNS and PNS function of myelin sheath to protect the neuron, provide insulation, and increase the speed of impulse transmission Another word for voltage is potential difference conductivity is ...

Equation for the number of stereoisomers and chiral centers # of stereoisomers=2^n n=chiral centers What does the direction of the electric field line represent? The movement of a positive test charge Oligodendrocytes and Schwann cells Produces myelin sheaths in the CNS and PNS function of myelin sheath to protect the neuron, provide insulation, and increase the speed of impulse transmission Another word for voltage is potential difference conductivity is ...

ASVAB Study Guide (Electronics) Latest 2023 Rated A+ Ohms Measure resistance Volt per amp Amperes Measure current Coulomb per second Volts Measures voltage (Newton x meter) per Coulomb Watts Measures power Joule per second Electron Flow Theory Behavior of electrons when moving through a conductor - Negatively charged electrons flow from the negative terminal (ANODE) to the positive terminal (CATHODE) - In response to the attractive and repulsive forces between the charged particles Componen...