What is the Charge of a Ball in an Electric Field?

In summary, the conversation discusses an electric field causing a 5.0 g point charge to hang at a 20 degree angle. The given variables include the electric field strength, mass of the ball, and angle, as well as the value of e0. The equations for electrostatic force and charge are mentioned, and it is determined that tension is not needed to solve the problem.
  • #1
KhaNgo
4
0
An electric field causes the 5.0 g point charge to hang at a 20 angle. What is the charge of the ball

I don't have the figure but it looks like a simple pendulum hanging at the angle of 20 degree

Homework Statement


E= 100,000 N/C
m of the ball = 5g
Angle =20 degree

e0= 8.85*10^12


Homework Equations



E = F (electrostatic) on p / p (charge)

F = (K q1 q2)/r12^2

q=E*r^2*4pi*e0

The Attempt at a Solution



I have no clue
 
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  • #2
KhaNgo said:
An electric field causes the 5.0 g point charge to hang at a 20 angle. What is the charge of the ball

I don't have the figure but it looks like a simple pendulum hanging at the angle of 20 degree

Homework Statement


E= 100,000 N/C
m of the ball = 5g
Angle =20 degree

e0= 8.85*10^12

Homework Equations



E = F (electrostatic) on p / p (charge)
F = (K q1 q2)/r12^2
q=E*r^2*4pi*e0

The Attempt at a Solution



I have no clue

Draw a force diagram.

Figure what needs to be in balance for the pendulum and weight to be at that angle.
 
  • #3
So basically, there will be tension, gravity and electric field act on it
and gravity and electric field will have x,y component but how can we figure out Tension?
So saying the ball doesn't move we can set everything =0 but we don't have tension
 
  • #4
Never mind, I've found the right answer...We actually don't need Tension to solve it
Thanks for great hint
 

FAQ: What is the Charge of a Ball in an Electric Field?

What is an electric field?

An electric field is a physical quantity that describes the influence that a charged object has on other charged objects in its vicinity. It is a vector quantity, meaning it has both magnitude and direction, and is typically represented by arrows pointing in the direction that a positively charged object would move if placed in the field.

How is an electric field created?

An electric field is created by the presence of charged objects. A positively charged object will create an electric field that points away from it, while a negatively charged object will create an electric field that points towards it. The strength of the electric field is determined by the magnitude of the charges and their distance from each other.

What is the formula for calculating electric field?

The formula for calculating electric field is E = kQ/r^2, where E is the electric field strength, k is a constant equal to 9 x 10^9 Nm^2/C^2, Q is the magnitude of the charge creating the field, and r is the distance from the charge to the point where the electric field is being measured.

How does an electric field affect charged particles?

An electric field exerts a force on charged particles that are placed within it. The direction of the force is determined by the charge of the particle and the direction of the electric field. A positively charged particle will experience a force in the same direction as the electric field, while a negatively charged particle will experience a force in the opposite direction.

What is the difference between an electric field and an electric potential?

While an electric field describes the force that a charged object exerts on other charged objects, electric potential describes the potential energy that a charged object has due to its position in an electric field. In other words, electric potential is a measure of the energy required to move a charged object from one point to another in an electric field.

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