Home
Class 12
PHYSICS
Find the time constant (in ) fo the give...

Find the time constant `(in ) fo the given RC circuits in the given order respectively
,

`(R_1)=1 Omega, (R_2)=2 Omega, C_(1)=4 muF, C_(2)=2 mu F`

A

`18,4,8/9`

B

`18,8/9,4`

C

`4,18,8/9`

D

`4,8/9,18

Text Solution

Verified by Experts

The correct Answer is:
B
Time constant of R-C circuit is `(tau)=(R_(eq))(C_(eq))`
(i) `(tau_1)=(2+1)(2+4)=18(mu)s`
(ii) `(tau_2)=((2xx1)/(2+1))((2xx4)/(2+4))=8/9 (mu s)`
(iii)`(tau_3)=((2xx1)/(2+1))xx(4+2)=4(mu s)`.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    SUNIL BATRA (41 YEARS IITJEE PHYSICS)|Exercise JEE Main And Advanced|129 Videos

  • ELECTROSTATICS

    SUNIL BATRA (41 YEARS IITJEE PHYSICS)|Exercise Comprehension Based Questions|2 Videos

Similar Questions

Explore conceptually related problems

Determine the voltage drop across the resistor R_(1) in the circuit given below with E=60 V, R_(1)=18 Omega, R_(2)=10 Omega .

Determine the voltage drop across the resistance R_(1) in the circuit given in Fig. 4.55 with epsilon=90 V, R_(1)=5 k Omega, R_(2)=5k Omega, R_(3)=10 k Omega " and " R_(4)=10 k Omega .

Knowledge Check

  • Find the time constant (in mu s ) for the given RC circuits in the given order respectively. R_(1) = 1 omega, R_(2) = 2 omega, C_(1) = 4muF, C_(2) = 2mu F

    A
    `18, 4, (8)/(9)`
    B
    `18, (8)/(9), 4`
    C
    `4, 18, (8)/(9)`
    D
    `4, (8)/(9), 18`

  • Find the time constant for the given RC circuits in correct order (in mus ) R_(1)=1Omega,R_(2)=2Omega,C_(1)=4muF,C_(2)=2muF

    A
    `18,4,(8)/(9)`
    B
    `18,(8)/(9),4`
    C
    `4,18,(8)/(9)`
    D
    `4,(8)/(9),18`

  • Initially the switch 'S' is open for a ling time. Now the switch 'S' is closed at t=0(R_(1)=2Omega, R_(2)=2Omega, C_(1)=1F and C_(2)=1F) Then

    A
    The current through the wire `AB` at `t=2` sec is `1//2e` ampere
    B
    The current through the wire at `t=2` sec is `1//e` ampere.
    C
    The charge on the capacitor `C_(2)`, which has initially unchargd at `t=2` sec is `(1- 1/(2e))` coulimbs
    D
    The charge on the capacitor `C_(1)` at `t=2` sec is `(1- 1/(2e))` coulombs

    • Similar Questions

    Explore conceptually related problems

    In the circuit shown in fig. the switch is kept closed in position 1 for a long time. At time t = 0 the switch is moved to position 2. Write the dependence of voltage (V_C) across the capacitor as a function of time (t). Take V_(C) to be positive when plate a is positive. Given: R_(1) = 20 Omega, R_(2) = 60 Omega, R_(3) = 400 kOmega, V_(1) = 40 V, V_(2)= 90 V and C = 0.5 mu F .

    Determine the voltage drop across the resistor R_1 in the circuit given below with E = 65V, R_1 = 50 OmegaR_2 = 100 Omega, R_3 = 100 Omega, and R_4 300 Omega.

    In the given circuit, R_(1) = 10Omega R_(2) = 6Omega and E = 10V, then correct statement is

    A generator with an adjustable frequency of oscillaton is connected to resistance, R = 1000 Omega , inductance, L_(1) = 1.7 mH and L_(2) = 2.3 mH and capacitance, C_(1) = 4 mu F, C_(2) = 2.5 mu F and C_(3) = 3.5 mu F . The resonant angular frequency of the circuit is

    In the given circuit, if I_1 and I_2 be the current in resistances R_1 and R_2 , respectively, then .

    Home
    Profile