What is the inductance reactance of a coil of 7H when connected to a 50Hz a.c circuit?
-
2200\(\Omega\)
- 2000\(\Omega\)
- 1200\(\Omega\)
- 1100\(\Omega\)
The correct answer is: A
Explanation
X\(_L\) = 2\(\pi\)fL
L = 7H, f = 50Hz
X\(_L\) = 2 x 3.142 x 7 x 50 = 2199.40 \(\approxeq\) 2200\(\Omega\)
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