PLEASE ANSWER ALL I NEED HELP ASAP I WILL GIVE THUMBS UP. THANK YOU! 1. Two iden
ID: 2034321 • Letter: P
Question
PLEASE ANSWER ALL I NEED HELP ASAP I WILL GIVE THUMBS UP. THANK YOU!
1. Two identical metal spheres A and B are connected by a plastic rod. Both are initially neutral. 5.0×1012electrons are added to sphere A, then the connecting rod is removed.
a) Afterward, what is the charge of A?
b) Afterward, what is the charge of B?
2. Two 4.0 kg masses are 3.0 m apart on a frictionless table. Each has 1.0 ?C of charge. What is the magnitude of the electric force on one of the masses? Express your answer using TWO significant figures only.
3. A -11 nC charge is located at the origin.
a) What is the strength of the electric field at the position (x,y)=(0cm,5.0cm)?
b) What is the strength of the electric field at the position (x,y)=(?5.0cm,?5.0cm)?
c) What is the strength of the electric field at the position (x,y)=(?5.0cm,5.0cm)?
4. A parallel-plate capacitor is constructed of two horizontal 14.0-cm-diameter circular plates. A 1.0 g plastic bead, with a charge of -6.4 nC is suspended between the two plates by the force of the electric field between them.
a) Which plate, the upper or the lower, is positively charged?
b) What is the charge on the positive plate?
5. Object A, which has been charged to + 12 nC , is at the origin. Object B, which has been charged to ? 28 nC , is at (x,y)=(0.0cm,2.0cm)
What is the direction of the electric force on object A?
a) positive x-axis
b) positive y-axis
c) negative x-axis
d) negative y-axis
What is the direction of the electric force on object B?
a) positive x-axis
b) positive y-axis
c) negative x-axis
d) negative y-axis
2. Two 4.0 kg masses are 3.0 m apart on a frictionless table. Each has 1.0 ?C of charge. What is the magnitude of the electric force on one of the masses? Express your answer using TWO significant figures only.
3. A -11 nC charge is located at the origin.
a) What is the strength of the electric field at the position (x,y)=(0cm,5.0cm)?
b) What is the strength of the electric field at the position (x,y)=(?5.0cm,?5.0cm)?
c) What is the strength of the electric field at the position (x,y)=(?5.0cm,5.0cm)?
4. A parallel-plate capacitor is constructed of two horizontal 14.0-cm-diameter circular plates. A 1.0 g plastic bead, with a charge of -6.4 nC is suspended between the two plates by the force of the electric field between them.
a) Which plate, the upper or the lower, is positively charged?
b) What is the charge on the positive plate?
5. Object A, which has been charged to + 12 nC , is at the origin. Object B, which has been charged to ? 28 nC , is at (x,y)=(0.0cm,2.0cm)
What is the direction of the electric force on object A?
a) positive x-axis
b) positive y-axis
c) negative x-axis
d) negative y-axis
What is the direction of the electric force on object B?
a) positive x-axis
b) positive y-axis
c) negative x-axis
d) negative y-axis
Explanation / Answer
1.
a)
Q = charge transferred = n e = (5 x 1012) (- 1.6 x 10-19) = - 8 x 10-7 C
QA = Q/2 = ( - 8 x 10-7 )/2 = - 4 x 10-7 C
b)
QB = Q/2 = ( - 8 x 10-7 )/2 = - 4 x 10-7 C
2.
Q = charge on each = full value of charge in missing
r = distance between the charge = 3 m
k = constant = 9 x 109
electric force between trhe two charges is given as
Fe = k Q2/r2
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.