When 100 volts dc is supplied across a solenoid, a current of 1.0 amperes flows in it. When 100 volts ac is applied across the same coil, the current drops to 0.5 ampere. If the frequency of ac source is 50 Hz, then the impedance and inductance of the solenoid are

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away

An Intiative by Sri Chaitanya

200 Ω and 0.55 henry

100 Ω and 0.86 henry

200 Ω and 1.0 henry

100Ω and 0.93 henry

answer is A.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

For dc, R=Vi=1001=100Ω For ac, Z=Vi=1000.5=200Ω∵Z=R2+(ωL)2⇒200=(100)2+4π2(50)2L2∴L=0.55H

Watch 3-min video & get full concept clarity