2 Simple Physics Questions on Electricity. Very easy - Please answer!

Question

1. Does the conductivity decrease or increase with temperature?

2. What happens when I stick a positive substance to a neutral one. My guess is that the neutral transfers electrons to positive, making positive one neutral and neutral one negative?

Please answer. 10 points for best answer. Thanks in advance.

Answer 1

R=P( L/A)    P=P0(1+alpha*delta T   )            R=1/c                              if T(tempreture) increase R(resistor) increase too and conductivity decrease

2)  both of them are positive but their amounts are less than first positive substance and depends on the shape of substances.                                                          

Answer 2

1. Electrical conductivity decreases with increase in temperature.

2. Neutral substance will transfer electrons to positive one making the positive one neutral and the neutral one positive.

There would be no net exchange of charges and , thus no reaction will take place.

Answer 3

increasing temperature will decrease the conductivity