Example 12 What is the current required to produce a field strength
of 500 A/m in a coil of 200 turns and a mean length of 500 mm?
HI 500 x 0.5
/ = —= = 1.25 A
N 200
10
PRINT "PROG 141"
20
PRINT"CURRENT"
30
INPUT "ENTER FIELD STRENGTH IN AMPS/METRE" : 11
40
INPUT "ENTER NUMBER OF TURNS" : N
50
INPUT "ENTER LENGTH IN MILLIMETRES" : L
60
LET I=H*L/(N*10*3)
70
PRINT "CURRENT = "
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