Question

Two 2.3-cm-diameter-disks spaced 1.6 mm apart form a parallel-plate capacitor. The electric field between the disks is 5.0×105 V/m . Part A Part complete What is the voltage across the capacitor? Express your answer with the appropriate units. V = 800 V Previous Answers Correct Part B How much charge is on each disk? Enter your answers numerically separated by a comma. Express your answers in coulombs. q1, q2 = 1.836⋅10−9,1.836⋅10−9 C Previous AnswersRequest Answer Incorrect; Try Again; 5 attempts remaining Part C An electron is launched from the negative plate. It strikes the positive plate at a speed of 2.4×107 m/s . What was the electron's speed as it left the negative plate? Express your answer with the appropriate units. vinitial =

Answer #1

(a)

the voltage across the capacitor is

V = E d = 5.0 * 10^5 ( 1.6 * 10^-3) = 800 V

(b)

The capacitence of the capcaitor is

C= eo A/ d

= 8 * 85 * 10^-12 ( pi ( 2.3 * 10^-2 m/2)^2/1.6 * 10^-3

= 2.297 * 10^-12 F

Q= CV = 2.297 * 10^-12 ( 800 V) = 1.838 * 10^-9 C = 1.838 nC

Q = 1.838 nC

(c)

Apply conservation of mechanical energy

delK + del U = 0

del K = - del U

1/2 m vf^2 - 1/2 m vi^2 = -q del V

vf^2 - vi^2 =- 2 q del V/m

vi^2 = vf^2 -2 q del V/m

= ( 2.4 * 10^7)^2 - 2 ( 1.6 * 10^-19) ( 800 V)/9.11 * 10^-31

vi = 1.71 * 10^7 m/s

Two 2.3-cm-diameter-disks spaced 2.0 mm apart form a
parallel-plate capacitor. The electric field between the disks is
4.6×105 V/m .
Part A
What is the voltage across the capacitor?
Part B
How much charge is on each disk?
Part C
An electron is launched from the negative plate. It strikes the
positive plate at a speed of 2.3×107 m/s . What was the
electron's speed as it left the negative plate?

Two 2.2-cm-diameter-disks spaced 1.9 mm apart form a
parallel-plate capacitor. The electric field between the disks is
4.8×105 V/m .
a) How much charge is on each disk?
b) An electron is launched from the negative plate. It strikes
the positive plate at a speed of 2.0×107 m/s . What was the
electron's speed as it left the negative plate?

Two 2.5-cmcm-diameter-disks spaced 1.5 mmmm apart form a
parallel-plate capacitor. The electric field between the disks is
4.7×105 V/mV/m .
What is the voltage across the capacitor?
How much charge is on each disk?
An electron is launched from the negative plate. It strikes the
positive plate at a speed of 2.0×107 m/sm/s . What was
the electron's speed as it left the negative plate?

Two 2.0-cm-diameter-disks spaced 2.0 mm apart form a
parallel-plate capacitor. The plates have charge
± 8.8nC.
What is the voltage across the capacitor? deltaVc
=_______________ Dont forget unit
An electron is launched from the negative plate. It strikes the
positive plate at a speed of 5.5×107 m/s . What was the
electron's speed as it left the negative plate?
vinitial=_____________________Dont forget unit

Two circular disks spaced 0.50 mm apart form a parallel-plate
capacitor. Transferring 1.20 ×109 electrons from one disk to the
other causes the electric field strength to be 1.20 ×105N/C.
What are the diameters of the disks?
Express your answer with the appropriate
units.

The electric field strength is 2.30×104 N/C inside a
parallel-plate capacitor with a 0.700 mm spacing. An electron is
released from rest at the negative plate. Part A What is the
electron's speed when it reaches the positive plate? Express your
answer with the appropriate units.

A.) Two identical closely spaced circular disks form a
parallel-plate capacitor. Transferring 2.5×109 electrons
from one disk to the other causes the electric field strength
between them to be 1.0×105 N/C .
What are the diameters of the disks? Express your answer to two
significant figures and include the appropriate units.
B.) At a distance r from a point charge, the electric
potential is 4600 V and the magnitude of the electric field is
2.0×105 V/m .
- What is...

Two 10.0-cm-diameter electrodes 0.59 cm apart form a
parallel-plate capacitor. The electrodes are attached by metal
wires to the terminals of a 14 Vbattery.
Part A
What is the charge on each electrode while the capacitor is
attached to the battery?
Enter your answers numerically separated by a comma.
q1, q2 =
C
Part B
What is the electric field strength inside the capacitor while
the capacitor is attached to the battery?
Express your answer with the appropriate units.
E...

The electric field strength is 5.50×104 N/C inside a
parallel-plate capacitor with a 2.00 mm spacing. A proton is
released from rest at the positive plate.
What is the proton's speed when it reaches the negative
plate?
Express your answer with the appropriate units.

A parallel-plate capacitor is formed from two 3.0 cmcm ××3.0
cmcm electrodes spaced 2.0 mmmm apart. The electric field strength
inside the capacitor is 1.0×106N/C1.0×106N/C.
What is the charge (in nCnC) on the positive electrode?
Express your answer in nanocoulombs.
Part B
What is the charge (in nCnC) on the negative electrode?
Express your answer in nanocoulombs.

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 12 minutes ago

asked 39 minutes ago

asked 49 minutes ago

asked 58 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago