Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main20246 Apr 2024Morning ShiftPhysicsAlternating CurrentActual

When a d c voltage of 100 ~V is applied to an inductor, a d c current of 5 ~A flows through it. When an ac voltage of 200 ~V peak value is connected to inductor, its inductive reactance is found to be 20 3 . The power dissipated in the circuit is _______ W.

Correct answer

0

Step-by-step solution

For DC voltage R = V I = 100 5 =20 for AC voltage aligned & X _ L =20 3 & R =20 & Z = X _ L ^2+ R ^2 = 3 400+400 =40 & Power = i _ rms ^2 R & = ( V _ rms Z )^2 R = ( 200 2 40 )^2 20=250 ~W aligned

Practice Alternating Current on Quantrex Academy →

More from Alternating Current

Consider a circuit consisting of a capacitor of capacitance C and a coil with N turns per unit length, cross sectional area S and length d , where d^2 S . There is another coil of 2026An LCR series circuit driven with E_ rms = 90 V at frequency f_d = 30 Hz has resistance R = 80 , , an inductance with inductive reactance X_L = 20.0 , and capacitance with capacitiv 2026A series LCR circuit with R = 20 , L = 1.6 H and C = 40 F is connected to a variable frequency a.c. source. The inductive reactance at resonant frequency is _______ . 2026An a.c. source of angular frequency is connected across a resistor R and a capacitor C in series. The current is observed as I . Now the frequency of the source is changed to /4 , 2026An inductor of 10 mH, capacitor of 0.1 F and a resistor of 100 are connected in series across an a.c power supply 220 V, 70 Hz. The power factor of the given circuit is 0.5 . The d 2026The figure given below shows an LCR series circuit with two switches S₁ and S₂ . When switch S₁ is closed keeping S₂ open, the phase difference ( ) between the current and source v 2026An inductor stores 16 J of magnetic field energy and dissipates 32 W of thermal energy due to its resistance when an a.c. current of 2 A (rms) and frequency 50 Hz flows through it. 2026The electric current in the circuit is given as i=i_ o (t / T) . The r.m.s current for the period t=0 to t=T is _ _ _ _ . 2026 Full Alternating Current list All JEE Main PYQs