1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

# The electric field due to an infinitely long line of charge at a point is 10 N/c. What is the electric field magnitude at a point which is twice as far from the line of charge

A

20 N/c

No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
B

5 N/c

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C

1 N/c

No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
D

2.5 N/c

No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
Open in App
Solution

## The correct option is B 5 N/c The electric field due to an infinitely long line of charge of uniform linear charge density varies with inverse of the perpendicular distance from the line of charge. It varies as λ4πε0r where r is the perpendicular distance from the line of charge. [In any case, if you don’t know this as a fact please goes through the derivation video for an infinitely long line charge] Now, as the distance becomes twice, the electric field will drop to half as there is a linear inverse relation

Suggest Corrections
0
Join BYJU'S Learning Program
Related Videos
Gauss' Law Application - Infinite Line of Charge
PHYSICS
Watch in App
Explore more
Join BYJU'S Learning Program