PHYS 165 Module problem set 7
A impartial rubber rod is rubbed with a chunk of neutral wool. As a end result, the rubber rod
has a negative charge and the wool has a tremendous charge. Explain how they have become
charged. - ANS-When the rod is rubbed with wool, electrons are scraped off the wool onto the
rod. This makes the rod have extra electrons than protons, and the wool now has fewer
electrons than protons.
A proton is in an electric area and studies an electric pressure of 8.34 x 10-11 N to the North.
What is the value and direction of the electrical discipline that the proton is in? - ANS-E= F/Q =
8.34 x 10^-11 N/ 1.60 x 10^-19 C =
five.21 x 10^8 N/C, North
A crimson tennis ball has a internet fee of + 4570 nC, and a inexperienced tennis ball has a net
rate of - 6120 nC. A) What is the electrostatic force among these two tennis balls if they may be
separated by using 35.0 cm? B) Is the pressure attractive or repulsive? - ANS-F=
okay(q1q2/r^2) = (9.Zero x 10^nine Nm^2/kg^2) (four.Fifty seven x 10^-6 C)(-6.12 x 10^-6 C) /
(0.350 m)^2
An atom of Uranium-238 carries ninety two protons, 146 neutrons, and 90 electrons. What is the
internet price of this atom? - ANS-ninety two protons - ninety electrons = net charge 2
+2e- = +three.20 x 10-19 C
Atoms are made of protons, neutrons, and electrons. What is the charge of each of those parts?
- ANS-Protons are +, neutrons are impartial, and electrons are -.
Define static strength. - ANS-Study of prices at relaxation.
Describe how an electroscope detects an electric price. - ANS-When a price is delivered close
to an electroscope, electrons circulate either towards the charged item or away from the
charged object, relying on its price. This will make the leaves of the electroscope every have the
same rate and they may repel each other. As a result, the leaves will upward thrust.
Draw the electrical area lines around an object with a internet poor fee. - ANS------------> <
-----------
-----------> O <-----------
-----------> <-----------
Draw the electrical area traces in among the plates of a charged capacitor. - ANS-<-----------
----------->
<----------- O ----------->
<----------- ----------->
During a physics demonstration, a physics instructor gets bowled over by a transfer of rate of
-450 nC. How many electrons were transferred to the instructor? - ANS-(-450)(1 x 10^-nine /
1)(1 / -1.60 x 10^-19C)=
2.Eighty one x 10^12 electrons
A impartial rubber rod is rubbed with a chunk of neutral wool. As a end result, the rubber rod
has a negative charge and the wool has a tremendous charge. Explain how they have become
charged. - ANS-When the rod is rubbed with wool, electrons are scraped off the wool onto the
rod. This makes the rod have extra electrons than protons, and the wool now has fewer
electrons than protons.
A proton is in an electric area and studies an electric pressure of 8.34 x 10-11 N to the North.
What is the value and direction of the electrical discipline that the proton is in? - ANS-E= F/Q =
8.34 x 10^-11 N/ 1.60 x 10^-19 C =
five.21 x 10^8 N/C, North
A crimson tennis ball has a internet fee of + 4570 nC, and a inexperienced tennis ball has a net
rate of - 6120 nC. A) What is the electrostatic force among these two tennis balls if they may be
separated by using 35.0 cm? B) Is the pressure attractive or repulsive? - ANS-F=
okay(q1q2/r^2) = (9.Zero x 10^nine Nm^2/kg^2) (four.Fifty seven x 10^-6 C)(-6.12 x 10^-6 C) /
(0.350 m)^2
An atom of Uranium-238 carries ninety two protons, 146 neutrons, and 90 electrons. What is the
internet price of this atom? - ANS-ninety two protons - ninety electrons = net charge 2
+2e- = +three.20 x 10-19 C
Atoms are made of protons, neutrons, and electrons. What is the charge of each of those parts?
- ANS-Protons are +, neutrons are impartial, and electrons are -.
Define static strength. - ANS-Study of prices at relaxation.
Describe how an electroscope detects an electric price. - ANS-When a price is delivered close
to an electroscope, electrons circulate either towards the charged item or away from the
charged object, relying on its price. This will make the leaves of the electroscope every have the
same rate and they may repel each other. As a result, the leaves will upward thrust.
Draw the electrical area lines around an object with a internet poor fee. - ANS------------> <
-----------
-----------> O <-----------
-----------> <-----------
Draw the electrical area traces in among the plates of a charged capacitor. - ANS-<-----------
----------->
<----------- O ----------->
<----------- ----------->
During a physics demonstration, a physics instructor gets bowled over by a transfer of rate of
-450 nC. How many electrons were transferred to the instructor? - ANS-(-450)(1 x 10^-nine /
1)(1 / -1.60 x 10^-19C)=
2.Eighty one x 10^12 electrons
