11b,
answer is b edited
which of the following quantities do not change when an ohmic resistor cnnected to battery is heated due to current
(a)drift speed
(b)resistivity
(c)resistance
(d)no of free electrons
-
UP 0 DOWN 0 0 9
9 Answers
1a) drift speed depends upon average collision time... which decrease with inc in temp.
b) resistivity decreases.
c) so does resistance.. (decreaess in a conductor)
R = RO[1-kΔt] and R=Ïl/A
d) no of free electrons in a conductor will remain same with rise in temp. only the no of collisions between them increase.
1@sky resistance n resistivity increases on increasing temp in conductor