Electric Circuits

Question 1

charging via friction

Answer 1

insulators rubbed together, electrons transferred

Question 2

van de graff

Answer 2

rubs insulators, builds static charge, study of sub-atomic particle behaviour, increased voltage

Question 3

forces between objects

Answer 3

objects exert non contact force as one creates electrical field and other experiences it due to charge

Question 4

current

Answer 4

rate of flow of charge from negative to positive

Question 5

conventional current

Answer 5

electrons flow from positive to negative, diode direction

Question 6

potential difference

Answer 6

difference in electrical potential energy between 2 points

Question 7

voltage

Answer 7

measure of force

Question 8

electricity

Answer 8

flow of electrons along a wire, colliding with metal ions

Question 9

resistance

Answer 9

how much a material attempts to stop flow from passing through

Question 10

increased length

Answer 10

increased resistance

Question 11

more compact

Answer 11

increased resistance

Question 12

what law does a filament lamp not follow?

Answer 12

Ohm’s

Question 13

resistor - current/ voltage

Answer 13

directly proportional

Question 14

bulb - current/ voltage

Answer 14

increased voltage = increased temperature = increased resistance

Question 15

diode - current/ voltage

Answer 15

current goes in one direction - high resistance in other direction

Question 16

semi conductor diode

Answer 16

conducts forward

Question 17

light dependant resistor

Answer 17

increased light intensity = decreased resistance

Question 18

thermistor

Answer 18

increased temperature = decreased resistance