Home
Class 12
PHYSICS
An AC voltage source of variable angular...

An AC voltage source of variable angular frequency `(omega)` and fixed amplitude `V_(0)` is connected in series with a capacitance C and an electric bulb of resistance R (inductance zero). When `(omega)` is increased

A

the bulb dimmer

B

the bulb glows brigher

C

total impedience of the circuit is unchanged

D

total impednece of the circuit increases

Text Solution

Verified by Experts

The correct Answer is:
B
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • ALTERNATING CURRENT

    RESONANCE|Exercise PART-II|6 Videos

  • ALTERNATING CURRENT

    RESONANCE|Exercise HIGH LEVEL PROBLEMS|11 Videos

  • ALTERNATING CURRENT

    RESONANCE|Exercise PART-IV Comprehension|11 Videos

  • ATOMIC PHYSICS

    RESONANCE|Exercise Advanved level problems|17 Videos

Similar Questions

Explore conceptually related problems

A series LCR circuit having resistance R, capacitance C and inductance L has a voltage source of angular frequency omega and voltage V_(in). Output voltage (V_(out)) is taken as voltage across the resistor and inductor combined. (a) Find eta=(V_(out))/V_("in") (b) Find eta in the limit of large omega(omegagtgt(1)/(RC),(1)/(sqrt(LC)),(R)/(L)) (C )Find eta in the limit of small omega(omegagtgt(1)/(RC),(1)/(sqrt(LC)),(R)/(L))

A box P and a coil Q are connected in series with an AC source of variable frequency.The EMF of source is constant at 10 V .Box P contains a capacitance of 1 muF in series with a resistance of 32 Omega .Coil Q has a self inductance 4.9 mH and a resistance of 68 Omega .The frequency is adjusted so that the maximum current flows in P and Q .Find the impedance of P and Q at this frequency.Also find the voltage across P and Q respectively.

Knowledge Check

  • An alternating voltage source of variable angular frequency 'o' and fixed amplitude V is connected in series with a capacitance C and electric bulb of resistance R (inductance zero). When ' omega ' is increased:

    A
    The bulb glows dimme
    B
    The bulb glows brighter
    C
    Net impedance of the circuit remains unchanged
    D
    Total impedance of the circuit increases

  • An a.c. voltage source of variable angular frequency w and fixed amplitude V, is connected in series with a capacitance C and an electric bulb of resistance R (inductance zero). When a is increased.

    A
    the bulb glows dimmer.
    B
    the bulb glows brighter.
    C
    total impedance of the circuit is unchanged.
    D
    total impedance of the circuit increases.

  • A lamp of 6 V, 12 W is connected in series with a resistance R and an electrical source of 12 V. To light the bulb property, value of R should be

    A
    `2 Omega`
    B
    `6 Omega`
    C
    `3 Omega`
    D
    None of the above

    • Similar Questions

    Explore conceptually related problems

    A lamp of 6 V, 12 W is connected in series with a resistance R and an electrical source of 12 V. To light the bulb property, value of R should be

    An alternating voltage, of angular frequency omega is induced in electric circuit consistin of inductance L and capacitance C, connected in parallel. Then across the inductance coil

    The power factor of an AC circuit having resistance (R) and inductance (L) connected in series and an angular velocity omega is

    An a.c. source of variable angular frequency o is connected to an LCR series circuit. Which one of the following graphs correctly represents variation of impedance Zof a.c. circuit with angular frequency omega ?

    A box P and a coil Q are connected in series with an AC source of variable frequency. The emf of the source is constant at 10 V . Box P contains a capacitance of 1 mu F in series with a resistance of 32 Omega . Coil Q has a self-inductance 4.9 mH and a resistance of 68 Omega in series. The frequency is adjusted to that the maximum current flows in P and Q . At this frequency (a) The impedance of P is 77 Omega (b) The impedance of Q is 85 Omega (c ) Voltage across P is 7.7 V (d) Voltage across Q is 9.7 V

    Home
    Profile