Physics Homework. Please show all work for the following questions. Thanks so mu
ID: 1534571 • Letter: P
Question
Physics Homework.
Please show all work for the following questions. Thanks so much!!
Which of the following will increase the capacitance of a parallel-plate capacitor? (There could be more than one correct choice.) an increase in the plate area and a decrease in the plate separation an increase in the charge on the plates a decrease in the potential difference between the plates an increase in the potential difference between the plates a decrease in the plate area and an increase in the plate separation The figure shows conventional current passing through a resistor. The arrow shows the direction in which this conventional current is flowing. Which of the following statements are correct? (There could be more than one correct choice.) The electric potential at point b is the same as it is at point a The electric potential is higher at point b than at point a. The charges are moving slower at point b than at point a. The current at point b is the same as the current at point a. The electric potential is lower at point b than at point a. The lengtExplanation / Answer
8.
C = Q/V = e0*A/d
which means capacitance is directly proportional to charge and inversly proportional to potential difference.
Simialarly capacitance is directly proportional to plate area and inversly proportional to plate separation.
Correct options are: A, B, & C
9.
Current flows from high potential to low potential.
So, the electric potential is lower at point b than at a.
Also current remains same in a wire.
Correct options are:D and E
10.
R = rho*L/A
A = pi*r^2
So,
R2/R1 = (r1/r2)^2
R2 = R1*(1/2)^2 = R1/4
reduced by a factor of 4.
Correct option is C.
11.
Resistivity = 1/resistance
resistivity will increase by a factor of 4.
Correct option is A.
12.
R1 = rho*L/(pi*b^2)
R2 = rho*2L/(pi*(2b)^2) = rho*L/(2*pi*b^2)
R2 = R1/2
R1 = 2*R2
Correct option is A.