The alternating voltage is an example of_______________?

Related Mcqs:

1. 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)

2. n an LCR series circuit, if V is the effective value of the applied voltage VR is the voltage across R VL is the effective voltage across L & Vc is the effective voltage across C then_______________?

   IA. V = VR+VL+VC
   B. V2 = VR2+VL2+VC2
   C. V2 = VR2+(VL-VC)2
   D. V2 = VL2+(VR-VC)2

3. An alternating current or voltage_____________________?

   A. fluctuates off and on
   B. varies in magnitude alone
   C. changes its direction again and again
   D. changes its magnitude harmonically and reverses its direction of flow after regularly recurring intervals

4. The value of the steady current which when flowing through the same resistor produces heat at the same rate as the mean rate of heat produced by the alternating current is__________________?

   A. Average current
   B. Sinusoidal current
   C. r.m.s current
   D. Net current

5. 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

6. To find the r.m.s value of an alternating current mathematically we need to have ________________?

   A. Mean value of I2
   B. Square root of mean value of I2
   C. Square root of I2
   D. Square of 1/2

7. In full wave rectification the output D.C. voltage across the load is obtained for_____________?

   A. The positive half cycle of input A.C.
   B. The negative half cycle of input A.C.
   C. The complete cycle of input A.C.
   D. All of the above.

8. An OP-AMP comparator is a circuit that compares the signal voltage on one of its inputs with a ______________?

   A. Non-inverting voltage at output
   B. Reference voltage on the other
   C. Virtual input
   D. Output

9. The rectangular voltage is an example of____________________?

   A. An analogue waveform
   B. Continuous wave form
   C. Electronic waveform
   D. A digital waveform

10. The carburettor of a car is an application of_______________?

    A. Venturi meter
    B. Bernoulli equation
    C. Both A and B
    D. None