EC- current and potential difference relationship

Question 1

draw the shape of a resistors IV graph

Answer 1

straight line through the origin

Question 2

why is a resistor iv graph this shape

Answer 2

its a straight line directly through the origin because in a resistor i is directly proportional to v therefore when maintained a constant temp (meaning R is kept the same ) it follows ohms law

Question 3

draw the shape of a filament lamp iv graph

Answer 3

stretched s shape

Question 4

describe the filaments IV graph

Answer 4

as the current increases in a positive or negative direct the the heat of the filament increases therefore the KE of the e and the lattice ions increases and therefore the drift velocity of the e decreases as R increases due to I=nAqv if V decreases so does I

Question 5

what shape is the diodes iv graph

Answer 5

backwards L

Question 6

describe the diodes Iv graph shape

Answer 6

when v is in a -ve direction for all v values the R is very high
before 0.7 in the +ve direction the resistance is very high
once it reaches the threshold voltage around 0.7 v the R decreases for any values above that