In the circuit shown, impedance will be
- 5 ohms.
- 9 ohms.
- 7 ohms.
Explanation from PART66Online
Resistance and inductive reactance in series add at right angles, not arithmetically: Z = square root of (R squared + XL squared) = square root of (16 + 9) = square root of 25 = 5 ohms, the 3-4-5 triangle. The 7 ohm option adds 4 and 3 directly, which ignores the 90 degree phase difference between the voltages across R and L.
P
pB1B2 asked · 23 Jan 2017
???
Community Comments (1)
D
danielconsonni
26 Dec 2020
Z = (R² + XL²)^½
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