A 60W, 120 V bulb is connected to a 240 V, 60 Hz supply with an inductance in series. Find the value of inductance so that bulb gets correct voltage

Question

A 60W, 120 V bulb is connected to a 240 V, 60 Hz supply with an inductance in series. Find the value of inductance so that bulb gets correct voltage.

MARKS Content Team · Accepted Answer

Correct answer: (D) (2√3)/(π)H. R=120^260=240 Ω we require i=0.5 A Or Z=480 Ω X_L=√(480^2-240^2)=240√3 Ω L=( 240√3)/(60×2π)=(2.√3)/(π)H

A $60 W$ , $120 V$ bulb is connected to a $240 V$ , $60 Hz$ supply with an inductance in series. Find the value of inductance so that bulb gets correct voltage.