A series L.R circuit connected with an ac source E=(25 sin 1000 t) V has a power factor of 1/(√(2)). If the source of emf is changed to E=(20 sin 2000 t) V, the new power factor of the circuit will be:

Electromagnetic Induction and Alternating Currents: JEE Main 2024 Physics question

JEE Main 2024 · 30 Jan, Morning shift · Q5927

JEE Main 202430 Jan, Morning shiftPhysicsMediumElectromagnetic Induction and Alternating Currents149× since 2002

A series L.R circuit connected with an ac source

E=(25 \sin 1000 t) V

has a power factor of

\frac{1}{\sqrt{2}}

. If the source of emf is changed to

\mathrm{E}=(20 \sin 2000 \mathrm{t}) \mathrm{V}

, the new power factor of the circuit will be :