Electric Charge and Force Calculation Help

  • Thread starter Thread starter Farside
  • Start date Start date
  • Tags Tags
    Electric
AI Thread Summary
To solve the first problem, use Coulomb's law, which states that the force between two charges is given by F_E = (Q1 * Q2) / (4πε₀r²). For the charges of +2 x 10^-6 C and -3 x 10^-6 C separated by 20 cm, calculate the force and determine its direction based on the nature of the charges. For the second problem, apply Ohm's law, V = IR, to find the resistance of the heating element in the coffeepot, given a voltage of 120 V and a current of 0.6 A. Both calculations involve fundamental principles of electric charge and force, ensuring a clear understanding of the concepts. Understanding these laws is essential for solving similar physics problems effectively.
Farside
Messages
7
Reaction score
0
I missed the material for these couple of problems. If someone could help explain how to solve them I would much appreciate it. :cool:

1.) A charge of +2 x 10^-6 C is 20cm from a charge of -3 x 10^-6 C. Find the magnitude and direction of the force on each charge.

2.) A 120-V electric coffeepot draws a current of 0.6 A. What is the resistance of its heating element?
 
Physics news on Phys.org
Farside said:
1.) A charge of +2 x 10^-6 C is 20cm from a charge of -3 x 10^-6 C. Find the magnitude and direction of the force on each charge.
Look up Coulomb's law.
2.) A 120-V electric coffeepot draws a current of 0.6 A. What is the resistance of its heating element?
Look up Ohm's law.
 
F_E = \frac{Q_1Q_2}{4\pi\epsilon_0r^2}

V = IR
 
Also Newtons Third Law should help you determine the force on EACH charge to your first question.
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Similar threads

Find the magnitude of the electric field at point P
Replies
5
Views
2K
Find the magnitude of the electric force from 3 charges at vertices of a cube
Replies
17
Views
2K
Are the 2nd and 3rd problems in this video correctly solved? (charged dipole and organ pipe problems)
Replies
3
Views
1K
(Help) Surface charge density (σ) for particle to hit plate...
Replies
4
Views
987
The vector sum of the electric forces exerted on a particle
Replies
3
Views
3K
Calculating Charge of an Electron w/ the Millikan Oil Drop Experiment
Replies
12
Views
2K
Electric Charge and Force free body diagrams
Replies
1
Views
4K
Electric Potential slowing a charged particle to a stop
Replies
4
Views
3K
Charge on a particle above a seemingly infinite charge plane
Replies
2
Views
5K
Calculate electric force using Coulomb's law (vector components are the struggle)
Replies
3
Views
1K

Hot Threads

Recent Insights

Back
Top