Are My Answers on Electromagnetism Correct?

  • Thread starter Thread starter AlbertEinstein
  • Start date Start date
AI Thread Summary
The discussion revolves around questions related to electromagnetism, specifically focusing on the correctness of provided answers. The first question addresses whether there is a lower limit to the electric force between two particles at a 1 cm separation, with the answer being zero. The second question considers if a gravitational field can be vectorially added to an electric field, to which the answer is affirmatively yes. The third question discusses the concept of 4π lines of force originating from a unit positive charge, with the responder admitting a lack of understanding. The thread seeks feedback and validation on these electromagnetism concepts.
AlbertEinstein
Messages
113
Reaction score
1
I am posting some questions from my textbook.These questions are discussive in nature. However I shall also give answers to which I want that you people should judge my answers and put forward your comments and suggestions about their correctness.
Looking for help from you guys.

ps. the questions will be mainly from electromagnetism.
 
Last edited:
Physics news on Phys.org
Electric field

1. Is there any lower limit to the electric force between two particles placed at a separation of 1 cm ?My ans>> Yes, zero.

2.Can a gravitational field be added vectorially to an electric field to get a total field?My ans>>yes because they are simply two vectors

3.In some old text it is mentioned that 4 \pi lines of force originate from each unit positive charge.Comment on the statement in view of the fact that 4 \pi is not an integer.
My ans>>sorry I have no clue.

Looking forward for your comments.


jitendra

ps: it is not 4^pi, it is 4*pi
 
Last edited:
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

An interesting GCSE question: Why are electric lamps connected in parallel in house wiring?
Replies
14
Views
461
Deduction about Magnetic Poles surrounding a Conductor
Replies
40
Views
3K
Did my textbook make a mistake when writing these units?
Replies
5
Views
773
Virtual Work and Static Equilibrium
Replies
3
Views
2K
Answer the question about time of cooling of a ball
Replies
12
Views
2K
Block and wedge problem -- Where am I going wrong?
Replies
7
Views
951
Projectile Motion Question (Envelope of trajectories) query
Replies
42
Views
2K
Relativity: Cosmic ray proton traveling to Earth
Replies
12
Views
956
Why does this not work? Projectile Motion problem for Dynamics Class
Replies
19
Views
3K
Is My Approach to Calculating Relative Velocity Correct?
Replies
20
Views
2K

Hot Threads

Recent Insights

Back
Top