Why Does Hair Stand Up When Touching a Van der Graaf Generator?

  • Thread starter Thread starter Idrees
  • Start date Start date
AI Thread Summary
When touching a Van der Graaf generator, hair stands up due to the buildup of static electricity, which creates an electric field. The electric field exerts a force on the charged particles in the hair, causing them to repel each other and stand on end. The direction of the hair's movement is influenced by the electric field's orientation and the charge distribution. Understanding the relationship between force, charge, and electric fields is key to grasping this phenomenon. This interaction illustrates fundamental principles of electrostatics.
Idrees
Messages
28
Reaction score
0
Why does your hair stand out when you touch the the van der graaf generator ?? What controls the direction of the hair
 
Physics news on Phys.org
Idrees said:
Why does your hair stand out when you touch the the van der graaf generator ?? What controls the direction of the hair

Well, since this is a homework/coursework question, we can't just give you the answer. But maybe we can give you a hint or two to help you figure it out yourself.

What is the equation that relates the force F on a charged particle Q in terms of its charge and the value of an electric field E that the particle is sitting in? What makes electric field?
 
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...
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...
Back
Top