Why do not the Electric field lines make a loop ?
Please explain clearly.
Answers
Answered by
5
When we say they do not form loops, we are talking about static electric charges. No current flow.
Electrostatic field lines indicate the direction of field E. If you place a charge +q, then it moves along the tangent to the field line with force F = E q. This (field) force is directed from +ve charge towards -ve charge. Because a +ve charge is repelled by a +ve charge and is attracted to a -ve charge.
Take a point A. draw a semicircular arc ACB. Let this be field line. Arrow direction be ACB. This means charge at A is +ve & charge at B is negative.
Now draw semicircular arc BDA to complete circle. If the direction is BDA, it means charge at B is +ve and at A is negative. Hence, the direction on arc BDA will be ADB and not BDA. Hence, field lines do not loop.
Electrostatic Field lines go from higher electric potential to lower potential. If they loop, it means potential at one point is more than itself or less than itself. it is impossible.
=====
But for a long current carrying wire (infinite) they make a loop. The electric field lines are concentric circles around infinite current carrying wire. These are not electrostatic field lines. As charges are flowing.
Electrostatic field lines indicate the direction of field E. If you place a charge +q, then it moves along the tangent to the field line with force F = E q. This (field) force is directed from +ve charge towards -ve charge. Because a +ve charge is repelled by a +ve charge and is attracted to a -ve charge.
Take a point A. draw a semicircular arc ACB. Let this be field line. Arrow direction be ACB. This means charge at A is +ve & charge at B is negative.
Now draw semicircular arc BDA to complete circle. If the direction is BDA, it means charge at B is +ve and at A is negative. Hence, the direction on arc BDA will be ADB and not BDA. Hence, field lines do not loop.
Electrostatic Field lines go from higher electric potential to lower potential. If they loop, it means potential at one point is more than itself or less than itself. it is impossible.
=====
But for a long current carrying wire (infinite) they make a loop. The electric field lines are concentric circles around infinite current carrying wire. These are not electrostatic field lines. As charges are flowing.
Anonymous:
nice answer sir !
:-)
Thanks for answering sir.... I got it now ^_^
Answered by
0
Answer:
when we say that they do not form loops
talking talking up we are talking about static electric charge no current flow
electrostatic electrostatic field lines indicate the direction of field
if if you take a charge + q then it moves along the tangent to the field line with a force f is equal to EQ
the field force is directed from plus we charged towards minus ve because plus which Aaj is repelled by - ve
take a point and draw a semicircular point ABC let this be feild line
Arrow Arrow direction be ABC
this this means charge at may plus v
and and charged bi is negative
now draw a semicircular arc to complete be ok the direction of Dak BDA will be a DB and not BDA hence the field lines do not loop
e electric start of field lines go higher if they loop at the potential point is higher it is possible compulsory
but the infinite current carrying the loop is higher the electric fields are concentrate in the infinite circle
this or not electrostatic field lines
hence charges are following
hope it's helpful for you ok
Similar questions