fucking electricity Flashcards
describe current in series
the same throughout the whole circuit
describe resistance in series
adds up
describe potential difference in a series circuit
adds up
describe current in parallel
split between branches according to resistance of branch
describe potential difference in a parallel circuit
the same everywhere
describe the resistance in parallel
always smaller than the smallest value resistor
how do you measure the force of a spring?
attach a newtonmeter to the spring and read off the scale
how do you find the acceleration of a moving object?
-fix a piece of card of known width to a trolley or other moving object
-let the object pass in front of the light gates
-read from the datalogger the time it took the card to pass in front of each light gate
describe the shape of a I-V resistor/filament bulb graph
s shape
describe the shape of a I-V diode graph
horizontal for ages, then straight line (maybe 60 degrees)?
describe the shape of a resistance/light intensity LDR graph
|
|\
| \
|. \
|. L _ _ _ _ _ _ _
|_____________________
…kinda ( you get what i mean)
describe the shape of a resistance/temperature thermistor graph
|
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|. \
|. \
| \
|. \
|_______\______________
.but more curved (slightly) ..kinda ( you get what i mean)
define ohm’s law
the rule that states that the current flowing through a resistor is directly proportional to the voltage across the resistor, provided the temperature remains constant
describe an alpha particle
2 protons and 2 neutrons
describe a beta particle
a fast moving, highly charged electron emitted from a nucleus