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Answer to Question #61334 in Electromagnetism for muhammad umar

Question #61334
17) A sphere of radius
a
is made of insulating material and has charge distributed uniformly throughout its volume. The charge density is
ρ
. Find the field due to the charge for
r≤a
.
a) rρ3ϵ0

b) 2rρϵ0

c) rρπϵ0

d) rρ3πϵ0
18) A galvanometer of resistance
120Ω
a full scale deflection with a current of 0.0005A. How would you convert it to an ammeter that reads a maximum current of 5A?
a) connect
2000Ω
in parallel to it
b) connect
200.12Ω
in series to it
c) connect
20.10Ω
in series to it
d) connect
0.012Ω
in parallel to it
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