Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Alternating Current question

2013 · Q130
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Physics
  4. /Alternating Current
  5. /2013 · Q130

Alternating Current question

2013 · Q130

NEETPhysicsAlternating CurrentMCQ+4 / −1
A coil of self-inductance L is connected in series with a bulb B and an AC source. Brightness of the bulb decreases when
  1. A
    a capacitance of reactance XC = XL is included in the same citcuit.
  2. B
    an iron rod is inserted in the coil.
  3. C
    frequency of the AC source is decreased.
  4. D
    number of turns in the coil is reduced.
View written solutionFree

Correct answer: B

If a bulb B and AC source are connected in series with self-inductance coil, then in such case the brightness of the bulb decreases when an iron rod is inserted in the coil which further increases impedance of the circuit.

PreviousNext

More from Alternating Current

  • The instantaneous values of alternating current and voltage in a circuit are given as i=2​1​ sin (100 πt) ampere e=2​1​sin(100πt+3π​) Volt The average power…2012 · MCQ
  • The current (I) in the inductance is varying with time according to the plot shown in figure. Which one of the following is the correct variation of voltage with time in the coil ? Includes diagram2012 · MCQ
  • In an electrical circuit R, L, C and a.c. voltage source are all connected in series. When L is removed from the circuit, the phase difference between the voltage and the current in the circuit is If instead, C is removed from the circuit,…2012 · MCQ
  • A coil has resistance 30 ohm and inductive reactance 20 ohm at 50 Hz frequency. If an ac source, of 200 volt, 100 Hz, is connected across the coil, the current in the coil will be2011 · MCQ
  • The r.m.s. value of potential difference V shown in the figure is Includes diagram2011 · MCQ
  • An ac voltage is applied to a resistance R and an inductor L in series. If R and the inductive reactance are both equal to 3 Ω, the phase difference between the applied voltage and the current in the circuit is2011 · MCQ
  • In the ac circuit an alternating voltage e = 2002​sin100t volts is connected to a capacitor of capacity 1 μF. The r.m.s. value of the current in the circuit is2011 · MCQ
  • A condenser of capacity C is charged to a potential difference of V1. The plates of th condenser are then connected to an ideal inductor of inductance L. The current through the inductor when the potential difference across the condenser…2010 · MCQ