If capacitance of L-C circuit is made four times then frequency of the circuit becomes___________________?

Related Mcqs:

1. The frequency of a circuit consisting of a capacitance C and a resistor R is________________?

   A. C/R
   B. R/C
   C. 1/RC
   D. 1/ 2RC

2. Fundamental frequency of stationary waves in open pipe is ______________ times the frequency in closed pipe?

   A. One
   B. Two
   C. Four time
   D. None of these

3. An alternating current of the r.m.s value of 4.0 A and frequency 50Hz flows in a circuit containing a 10Ω resistor. The peak current is then ?

   A. 20A
   B. 20.66A
   C. 6.66A
   D. 5.66A

4. A simple pendulum has a bob of mass m and its frequency is f. If we replaced the bob with a heavier one say of 2m then that will be its new frequency ?

   A. 1/4f
   B. 1/2f
   C. frequency lower than 20 Hz
   D. 2f

5. An A.C series circuit containing 4Ω resistance and 3Ω inductive reactance. The impedance of the circuit is______________?

   A. 1Ω
   B. 5Ω
   C. 7Ω
   D. 7Ω

6. A capacitor of capacitance 30µF is charged by a constant current of 10mA. If initially, the capacitor was uncharged what is the time taken for the potential difference across the capacitor to reach 300V ?

   A. 0.9sec
   B. 15 sec
   C. 1.5x105sec
   D. 0.9x102sec

7. When a pure inductor of inductance L and a pure capacitor of capacitance C are connected in parallel to a sinusoidal potential difference V the potential difference across both L & C will be_______________?

   A. Same
   B. Different
   C. At L will be more than at C
   D. At L will be less than at C

8. If the length of the second pendulum becomes four times, then its time period will become________________?

   A. 4 times
   B. 6 times
   C. 8 times
   D. 2 times

9. An alternating current is represented by the equation I = I∫sinπt which of the following equation represents an alternating current of frequency and amplitude twice that of the above current ?

   A. I = 2I∫Sin(πt/2)
   B. I = 2I∫Sin(2πt)
   C. I = 2ISinπt
   D. I = I∫sin(2πt)

10. A wire of resistance R is coiled inductively so that its inductance is L. The impedance of the coil at a frequency of f is_______________?

    A. (R+2πfL)
    B. R+1/2πfL
    C. (R2+f2L2)
    D. (R2+4π2f2L2)