A coil has resistance 30 ohm and inductive reactance 20 ohm at 50 Hz frequency. If an ac source, of 200volt, 100 Hz, is connected across the coil, the current in the coil will be

Question

Accepted Answer

Correct answer: B. (b) Here, Resistance, R=30 Inductive reactance, X_L=20 at 50 Hz ∵X_L=2 L ∴ X_LX_L '= ’ X_L^ '= ' X_L= ( 10050 ) 20 =40 Impedance, Z= R^2+ (X_L^ ' )^2= (30 )^2+ (40 )^2=50 Current in the coil, I= VZ= 200V50 =4A

$A coil has resistance 30 ohm and inductive reactance 20 ohm at 50 Hz frequency. If an ac source, of 200 volt, 100 Hz, is connected across the coil, the current in the coil will be$

Solution

More Electromagnetic Induction PYQs