Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET 2023
Exam
NEET
Year
2023
Subject
Physics
Chapter
Alternating Current

NEET 2023 · Physics · Alternating Current

A 12V, 60W lamp is connected to the secondary of a step down...

A 12V,60W12V, 60W lamp is connected to the secondary of a step down transformer, whose primary is connected to ac mains of 220V220V. Assuming the transformer to be ideal, what is the current in the primary winding?

Options

  1. A0.37A0 . 37A
  2. B0.27A0 . 27A
  3. C2.7A2 . 7A
  4. D3.7A3 . 7A

Correct answer

B. 0.27A0 . 27A

Step-by-step solution

For an ideal transformer,

(Power)input=(Power)output⇒VPIP=(Power)output⇒IP=60220≈0.27A{\left(Power\right)}_{input} = {\left(Power\right)}_{output} ⇒ {V}_{P}{I}_{P} = {\left(Power\right)}_{output} ⇒ {I}_{P} = \dfrac{60}{220} \approx 0 . 27A

Practice Alternating Current on Quantrex Academy →

More from Alternating Current

A step down transformer connected to an a.c. mains of 220 V is made to operate at 5.5 V… MHT CET Medical 2026Which phasor diagram represents LCR circuit at resonance? MHT CET Medical 2026For an R-L series circuit, the power factor is 3 2 , for R-L frequency f Hz. If the… MHT CET Medical 2026In an AC circuit, the current is I = 100 (5t) A. The value of I_ rms is MHT CET Medical 2026The ratio of power factor of purely resistive circuit to purely reactive circuit is ( 0^… MHT CET Medical 2026In an LCR series circuit, at resonance, MHT CET Medical 2026In an AC circuit, E and I are given by E = 150 (150t) V and I = 150 (150t + (π)/(3)) A.… MHT CET Medical 2026A series LCR circuit is connected across a source E of e.m.f. E=15 ( 50 π t- (π)/(3)).… MHT CET Medical 2026 Full Alternating Current list All NEET PYQs