What is the inductance reactance of a coil of 7H when connected to a 50Hz a.c circuit?
A
2200\(\Omega\)
B
2000\(\Omega\)
C
1200\(\Omega\)
D
1100\(\Omega\)
Verified Correct Answer: A.
Physical Principles & Numerical Solution
X\(_L\) = 2\(\pi\)fL
L = 7H, f = 50Hz
X\(_L\) = 2 x 3.142 x 7 x 50 = 2199.40 \(\approxeq\) 2200\(\Omega\)
Source: WAEC / JAMB / NECO Classroom Archive (Record #70433)