Physics paper 1 stuvia - Study guides, Class notes & Summaries

step-up transformer (first transformer in a national grid diagram) - ANSWERa transformer that increases voltage step-down transformer (second transformer in a national grid diagram) - ANSWERa transformer that decreases voltage transformer - ANSWERA device that increases or decreases the voltage of alternating current transformer - ANSWERdecreases current Power=(current)^2*resistance - ANSWERP=I^2*R Resistance equation - ANSWERVoltage/current Efficiency equation - ANSWEREfficien...

What is meant by work function (2) - ANSWERMinimum energy required by an electron to escape from (1) a metal surface (1) What is meant by ionisation energy? (2) - ANSWERMinimum energy required to remove an electron from an atom (1) from the ground state (1) Why do emitted electrons have a kinetic energy that varies up to a maximum value? (4) - ANSWEREnergy of a photon is fixed/constant (1) Energy is required for electrons to overcome work function ø (1) Electrons deeper into/below the s...

It is unlikely that all of the electricity that the UK needs can be generated by solar power systems. Explain why - ANSWERA really large area of land would need to be covered with solar cells due to the low useful power output of the solar cells Suggest two advantages of using this method to charge electric cars compared with plugging them into the mains electricity supply. - ANSWERrecharging is a continuous process fewer cells needed in the car more cars can be charged at the same time ...

Diode - ANSWERAllows current to flow in only one direction specific heat capacity - ANSWERthe energy required to raise the temperature of one Kg of a substance by one degree Celsius Thermal insulation - ANSWERMaterial which is used to reduce the amount of energy transferred by heating from an object. electrical resistance - ANSWERThe opposition posed by a material or a device to the flow of current Density - ANSWERthe degree of compactness of a substance. lamp - ANSWERcircle with ...

Resistance of component 1 + resistance of component 2 - ANSWERTotal resistance = ? mass x gravitational field strength - ANSWERWeight = ? spring constant x extension - ANSWERforce applied to a spring = ? force x distance (perpendicular to the direction

THe current in the circuit is I. The pd across R1 is V2 and the pd acrouse R2 is V2, explain how the law of conservation of energy applies in the circuit , you should consider the movement of one coulomb of charge around the circuit. (2) - ANSWER-(1 C of) the charge gains ε J on passing through cells. - (for 2 mark) ε= IR1+IR2+Ir Prisim question path of ray info? - ANSWERSommit like the ray reflecting back outside of prism is parallel to refracting ray of light paths (I think, maybe). G...

AS PHYSICS Paper 1 June 2022

AS PHYSICS 7407/1 Paper 1 Mark scheme June 2022

What is the potential voltage of uk mains electricity supply? - ANSWER230V What colour is the earth wire in a three-core cable - ANSWERYellow and green stripes What is the frequency of the UK mains electricity supply? - ANSWER50Hz What is the role of a step-up transformer? - ANSWERTo reduce the energy lost due to heating What is an isotope? - ANSWERAtom with same number protons but different number of neutrons Is radioactive decay random? - ANSWERYes What is a half-life? - ANSW...

Reverse Bias - ANSWER When very little currency can flow in the reverse direction of a diode Variable Resistor - ANSWER Can be used to change the current through a circuit can also be called a rheostat NTC Thermistor - ANSWER (A type of semiconductor) that has decreasing resistance when its temperature increases - negative temperature coefficient Transitional Temperature - ANSWER The critical temperature at and below which a superconductor has zero resistivity Semiconductor - ANSWER ...