Solve Electrical Problems: Airplane in Thundercloud, Point Charges & More!

  • Thread starter Thread starter thspoq2
  • Start date Start date
AI Thread Summary
The discussion revolves around solving various electrical problems related to physics and electrical engineering concepts. Key questions include calculating the electric field experienced by an airplane in a thundercloud with specific charge concentrations, determining the electrical potential at the midpoint between two point charges, and finding the applied voltage for a lamp with known resistance and power. Additionally, the discussion touches on the temperature coefficient of resistivity for ohmic materials and the energy stored in a capacitor when the separation of its plates is doubled while maintaining the same charge. These problems highlight fundamental principles of electricity and electromagnetism.
thspoq2
Messages
15
Reaction score
0
Im doing some homework problems and I cannot figure out how to do these for the life of me. Any help would be appreciated.

1. An airplane is flying through a thundercould at a height of 2000 m. If there is a charge concentration of +40 C at 3000 , within the cloud and -40 C at height 1000 m, what is the electric field at the aircraft?

2. Two point charges of values +3.4 and +6.6 C are separated by .10 m. What is the electrical potential at the point midway between the two point charges?

3. If a lamp has resistance of 120 Ohms when it operates at 100W, what is the applied voltage?

4. The temperature coefficient of resistivity for a "perfect" ohmic material would be?
 
Physics news on Phys.org
Sorry, make it 5.

5. A pair of parallel plates, forming a capacitor, are charged. The plates are pulled apart to double the original seperation, the charges on the plates remaining the same. What is the ratio of the final energy stored to the original energy stored?
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

How Do You Correctly Calculate the Electric Field Under a Thundercloud?
Replies
5
Views
3K
Electric field with three charges and a point
Replies
1
Views
3K
What is the electric field at this point?
Replies
2
Views
1K
Finding Equilibrium in Electric Fields of Two Charges
Replies
13
Views
3K
Electric field strength at a point between charges
Replies
1
Views
2K
Kinetic and potential energy of a particle attracted by charged sphere
Replies
6
Views
1K
Finding magnitude of two charge given midpoint
Replies
1
Views
2K
Electric field using Gauss' Law
Replies
3
Views
1K
Electric Field of Point Charges in Equilateral Triangle
Replies
3
Views
10K
Electric Potential Difference Problem
Replies
10
Views
2K

Hot Threads

Recent Insights

Back
Top