Which statement is true of the electric field at a distant from the source of charge?
1 answer:
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Answer:
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Answer: hello the complete question is attached below
answer :
r2 = 4r1
Explanation:
Electric field strength = F / q
we will assume the rod has an infinite length
For an infinitely charged rod
E ∝ 1/ r
considering two electric fields E1 and E2 at two different locations as described in the question
E1/E2 = r1/r2 ----- ( 2 )
<u>Calculate for r2 when E2 = E1/4 </u>
back to equation 2
E1 / (E1/4) = r1 / r2
∴ r2 = 4r1
Answer:
ratio =0.3075 T
Explanation:
The magnetic field B creates a force on a moving charge such that
Now this causes a centripetal acceleration
so
...........(i)
...............(ii)
If accelerating potential V is same and then kinetic energy equals the potential energy difference
put these value in equation (ii)
simplifying we get
for same location r will be same in both case
..............(iii)
..........(iv)
dividing (iv) and (iii) equation we get
so on solving we get
=0.3075 T