AQA A LEVEL PHYSICS PAPER 1 EXAM UPDATED EXAM WITH VERIFIED SOLUTIONS.

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AQA A LEVEL PHYSICS PAPER 1
EXAM UPDATED EXAM WITH
VERIFIED SOLUTIONS.

Define yield stress of a material - correct answer -force per unit
area (1) at which material permanently deformed (1) for no/small
increase in force




Define density of a material - correct answer -mass per unit
volume




Explain what is meant by spring constant (k) - correct answer -
force divided by extention




State what is meant by a superconductor (2) - correct answer -
conductor which has 0 resistance (1) at critical temperature (1)




State what is meant by the emf of a battery (1) - correct answer -
energy changed to electrical energy per unit charge

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Define potential difference - correct answer -work done per unit
charge




Explain why the use of superconductors would improve the
efficiency of power stations and hence reduce carbon dioxide
emissions - correct answer -less energy lost (In conducting wires)
(1) less fuel needed (1)




Explain what is meant by a potential divider - correct answer -a
combination of resistors across a voltage source to produce a
required pd




State what is meant by 'non-ohmic' - correct answer -resistance
not constant (V not directly proportional to I)




Example of non-ohmic conductor - correct answer -filament
lamp/LDR/thermistor