02 = 0 99 A (c) For the ideal ammeter with zero resistance,
 I =  3/3 = 1 00 A
Rationalised 2023-24
133
Moving Charges and
Magnetism
2
0
2
2 3/2
2(
)
IR
B
x
R
µ
=
+
At the centre this reduces to
0
2
I
B
R
µ
=
6