Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Alternating Current question

2020 · 3 Sep · Shift 1 · Q60
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Physics
  4. /Alternating Current
  5. /2020 · 3 Sep · Shift 1 · Q60

Alternating Current question

2020 · 3 Sep · Shift 1 · Q60

JEE MainPhysicsAlternating CurrentMCQ+4 / −1
A 750 Hz, 20 V (rms) source is connected to a resistance of 100 Ω\OmegaΩ, an inductance of 0.1803 H and a capacitance of 10 μ\muμ F all in series. The time in which the resistance (heat capacity 2 J/oC) will get heated by 10oC. (assume no loss of heat to the surroudnings) is close to :
  1. A
    348 s
  2. B
    418 s
  3. C
    245 s
  4. D
    365 s
PreviousNext

More from Alternating Current

  • A series L-R circuit is connected to a battery of emf V. If the circuit is switched on at t = 0, then the time at which the energy stored in the inductor reaches (n1​) times of its maximum value, is :2020 · MCQ
  • In a series LR circuit, power of 400W is dissipated from a source of 250 V, 50 Hz. The power factor of the circuit is 0.8. In order to bring the power factor to unity, a capacitor of value C is added in series to the L and R. Taking the…2020 · Numerical
  • A LCR circuit behaves like a damped harmonic oscillator. Comparing it with a physical spring-mass damped oscillator having damping constant 'b', the correct equivalence would be:2020 · MCQ
  • An emf of 20 V is applied at time t = 0 to a circuit containing in series 10 mH inductor and 5 Ω resistor. The ratio of the currents at time t =∞ and at t = 40 s is close to : (Take e2 = 7.389)2020 · MCQ
  • In LC circuit the inductance L = 40 mH and capacitance C = 100 μ F. If a voltage V(t) = 10sin(314t) is applied to the circuit, the current in the circuit is given as :2020 · MCQ
  • An alternating voltage v(t) = 220 sin 100 π t volt is applied to a purely resistance load of 50 Ω . The time taken for the current to rise from half of the peak value to the peak value is :2019 · MCQ
  • A circuit connected to an ac source of emf e = e0sin(100t) with t in seconds, gives a phase difference of π/4 between the emf e and current i. Which of the following circuits will exhibit this ?2019 · MCQ
  • A series AC circuit containing an inductor (20 mH), a capacitor (120 μ F) and a resistor (60 Ω) is driven by an AC source of 24V/50 Hz. The energy dissipated in the circuit in 60 s is :2019 · MCQ