JAMB - Physics (2024 - No. 43)
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\(\Omega\)
Giải thích
X\(_L\) = 2\(\pi\)fL
L = 7H, f = 50Hz
X\(_L\) = 2 x 3.142 x 7 x 50 = 2199.40 \(\approxeq\) 2200\(\Omega\)