Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2007PhysicsAlternating CurrentActual

The primary and secondary coils of a transformer have 50 and 1500 turns respectively. If the magnetic flux linked with the primary coil is given by = _v+4 t , where is in webers, t is time in seconds and _v is a constant, the output voltage across the output voltage across the secondary coil is:

Options

  1. A120 volts
  2. B220 volts
  3. C30 volts
  4. D90 volts.

Correct answer

A. 120 volts

Step-by-step solution

The magnetic flux linked with the primary coil is given by ( = ₀+4 t ) So, voltage across primary ( aligned & V_p= d d t = d d t ( ₀+4 t ) & .=4 volt (as ₀= constant ) aligned ) Also, we have (N_p=50 and N_s=1500 ) From relation, ( aligned & V_s V_p = N_s N_p & or V_s=V_p N_s N_p & =4 ( 1500 50 ) & =120 ~V aligned )

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, 44 W lamp. The current in the primary circuit is (Ignore power losses) 2026Which phasor diagram represents LCR circuit at resonance? 2026For an R-L series circuit, the power factor is 3 2 , for R-L frequency f Hz. If the frequency doubles, the new power factor will be 2026In an AC circuit, the current is I = 100 (5t) A. The value of I_ rms is 2026The ratio of power factor of purely resistive circuit to purely reactive circuit is ( 0^ = 1 and 90^ = 0 ) 2026In an LCR series circuit, at resonance, 2026In an AC circuit, E and I are given by E = 150 (150t) V and I = 150 (150t + 3 ) A. The power dissipated in the circuit is (60)^ = 1/2 2026A series LCR circuit is connected across a source E of e.m.f. E=15 (50 t- 3 ) . The current from the supply is I=5 (50 t+ 6 ) . The impedance of the circuit and the phase differenc 2026 Full Alternating Current list All NEET PYQs