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Tardigrade
Question
Physics
The electric field at 20 cm from the centre of a uniformly charged non-conducting sphere of radius 10 cm is E. Then at a distance 5 cm from the centre it will be
Q. The electric field at
20
c
m
from the centre of a uniformly charged non-conducting sphere of radius
10
c
m
is
E
. Then at a distance
5
c
m
from the centre it will be
1802
220
Electric Charges and Fields
Report Error
A
16 E
B
4 E
C
2 E
D
Zero
Solution:
R
=
10
c
m
,
r
=
20
c
m
E
=
(
0.2
)
2
k
Q
Now at
r
=
5
c
m
E
′
=
(
0.1
)
3
k
Q
(
0.05
)
Now,
E
E
′
=
(
0.1
)
3
(
0.05
)
(
0.2
)
2
=
2
E
=
2
E