1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kondaur [170]
3 years ago
6

(a) What is the potential between two points situated 10 cm and 20 cm from a 3.0-μC point charge? (b) To what location should th

e point at 20 cm be moved to increase this potential difference by a factor of two?
Physics
1 answer:
julia-pushkina [17]3 years ago
7 0

Answer:

(a) 135 kV

(b) The charge chould be moved to infinity

Explanation:

(a)

The potential at a distance of <em>r</em> from a point charge, <em>Q</em>, is given by

V = -\dfrac{kQ}{r}

where k = 9\times 10^9 \text{ F/m}

Difference in potential between the points is

kQ\left[-\dfrac{1}{0.2\text{ m}} -\left( -\dfrac{1}{0.1\text{ m}}\right)\right] = \dfrac{kQ}{0.2\text{ m}} = \dfrac{9\times10^9\text{ F/m}\times3\times10^{-6}\text{ C}}{0.2\text{ m}}

PD = 135\times 10^3\text{ V} = 135\text{ kV}

(b)

If this potential difference is increased by a factor of 2, then the new pd = 135 kV × 2 = 270 kV. Let the distance of the new location be <em>x</em>.

270\times10^3 = kQ\left[-\dfrac{1}{x}-\left(-\dfrac{1}{0.1\text{ m}}\right)\right]

10 - \dfrac{1}{x} = \dfrac{270000}{9\times10^9\times3\times10^{-6}} = 10

\dfrac{1}{x} = 0

x = \infty

The charge chould be moved to infinity

You might be interested in
A speaker draws 2 amps of current when it is connected to a 16 volt source. What is the resistance of the speaker? Question 2 op
Oksana_A [137]
Did you ever find this answer
5 0
3 years ago
A wave has a wavelength of 20 mm and a frequency of 5 Hz what is the speed?
yKpoI14uk [10]
The answer is 100mm/s. I hope this helps :)

7 0
3 years ago
Which is an example of a monthly fixed cost for a sandwich shop?
aivan3 [116]
I think the correct answer from the choices listed above is option A. The rent is an<span> example of a monthly fixed cost for a sandwich shop. It is a fixed cost since you are required to pay for it per month. Hope this answers the question. Have a nice day.</span>
3 0
3 years ago
Read 2 more answers
I WILL MARK BRAINLIEST TO WHOEVER GETS THIS CORRECT
Veseljchak [2.6K]

Answer:

If south-east Texas is where H then it is C, but if not the answer is A.

6 0
3 years ago
Read 2 more answers
The two types of waves are ……………………………………wave and …………………………
Annette [7]

Answer:

longitudinal and transverse.

Explanation:

plzzzzzzz Mark my answer in brainlist

4 0
2 years ago
Other questions:
  • gives the speed v versus time t for a 0.500 kg object of radius 6.00 cm that rolls smoothly down a 30° ramp. The scale on the ve
    5·1 answer
  • What is the average speed of a car that traveled 222.0 miles in 4.596 hours?
    13·1 answer
  • Look at the picture and help me plz
    7·2 answers
  • Fiona drives 18 meters east and 24 meters south. What is the magnitude of her displacement?
    10·1 answer
  • Describe the energy transformations that occur in a waterfall...
    12·2 answers
  • What observations can the geologist make by working outdoors instead of in a lab?
    14·1 answer
  • One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a s
    11·1 answer
  • A wave has a frequency of 240 Hz and a wavelength of 3.0m what is the speed of the wave
    11·2 answers
  • Newspapers often talk about an energy crisis-about running out of certain energy sources in the not-so-distant future. About whi
    13·1 answer
  • 1.Which car has zero acceleration?<br><br>2. which car is decelerating? ​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!