Help with my homework please! Show all work. Thanks! Which of the following will

Question

Help with my homework please!

Show all work. Thanks!

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 len

Explanation / Answer

8) capacitance is C = eo*A/d

by increaing plate area A and decreasing plate seperation d ,we can increase the capacitance

So the answer is A)

9) current flows from higher potential to lower potential

and in series combination current is same at every point

So the correct options are D) and E)

10) Resistance is inversely proportional to the Area of cross section

then R1*A1 = R2*A2

R*pi*r^2 = R2*pi*(2*r)^2

R2 = R/4

so correct option is C)

11) resistivity is an intrinsic property so it does not changes

So the correct option is C)

12) R1 = rho*L/(pi*b^2)

R2 = rho*(2L)/(pi*(2b)^2)

R1/R2 = (L/(pi*b^2))*((pi*4*b^2)/(2L))

R1/R2 = 4/2 = 2

R1 = 2*R2

So the correct option is A)

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