AQA GCSE COMBINED SCIENCE
TRILOGY HIGHER TIER CHEMISTRY
PAPER 1H 3
◉ What happens to potential difference in parallel circuits. Answer:
It is the same
◉ What happens to current in a parralell circuit. Answer: It is shared
◉ What happens to resistors in a parralell circuit. Answer: It reduces
the total resistance
total resistance of 2 resistors is less than the smallest individual
resistor
◉ What is mains supply. Answer: Ac (p+n ends alternate) 230v, 50hz
◉ What is the blue wire. Answer: Neutral
◉ What is the red wire. Answer: Live, provides ac
◉ What is the green and yellow wire. Answer: Earth wire
,◉ When charge flows in a circuit.... Answer: ... work is done
◉ Energy transferred =. Answer: Power x time
Charge flow (c) x PD
◉ Power=. Answer: Pd x Current
Current^2 x resistance
J/time
◉ National grid uses. Answer: High PD low current so less energy
lost to surroundings. This is charged by step up and step down
transformers
◉ What is the national grid. Answer: System of cables and
transformers that cover the uk and connects power stations to
consumers
◉ What is battery supply. Answer: Dc
◉ Build up of static is caused by. Answer: Friction, negative electrons
are scraped off
◉ What does too much static cause. Answer: Sparks.
, High PD -> strong electrical field -> electrons to be removed ->
current flows through air -> spark
◉ Electric field lines go. Answer: From positive to negative
◉ Charged objects in an electric field. Answer: Feel a force
◉ What does a diode look like?. Answer:
◉ What does a resistor look like?. Answer:
◉ What does a variable resistor look like?. Answer:
◉ What does a LED look like?. Answer:
◉ What does a fuse look like?. Answer:
◉ What does a thermistor look like?. Answer:
◉ What does a LDR look like?. Answer:
TRILOGY HIGHER TIER CHEMISTRY
PAPER 1H 3
◉ What happens to potential difference in parallel circuits. Answer:
It is the same
◉ What happens to current in a parralell circuit. Answer: It is shared
◉ What happens to resistors in a parralell circuit. Answer: It reduces
the total resistance
total resistance of 2 resistors is less than the smallest individual
resistor
◉ What is mains supply. Answer: Ac (p+n ends alternate) 230v, 50hz
◉ What is the blue wire. Answer: Neutral
◉ What is the red wire. Answer: Live, provides ac
◉ What is the green and yellow wire. Answer: Earth wire
,◉ When charge flows in a circuit.... Answer: ... work is done
◉ Energy transferred =. Answer: Power x time
Charge flow (c) x PD
◉ Power=. Answer: Pd x Current
Current^2 x resistance
J/time
◉ National grid uses. Answer: High PD low current so less energy
lost to surroundings. This is charged by step up and step down
transformers
◉ What is the national grid. Answer: System of cables and
transformers that cover the uk and connects power stations to
consumers
◉ What is battery supply. Answer: Dc
◉ Build up of static is caused by. Answer: Friction, negative electrons
are scraped off
◉ What does too much static cause. Answer: Sparks.
, High PD -> strong electrical field -> electrons to be removed ->
current flows through air -> spark
◉ Electric field lines go. Answer: From positive to negative
◉ Charged objects in an electric field. Answer: Feel a force
◉ What does a diode look like?. Answer:
◉ What does a resistor look like?. Answer:
◉ What does a variable resistor look like?. Answer:
◉ What does a LED look like?. Answer:
◉ What does a fuse look like?. Answer:
◉ What does a thermistor look like?. Answer:
◉ What does a LDR look like?. Answer:
