In EMC signal, the source delivers maximum power to the input of transmission line when the transmission line input impedance

Related Mcqs:

1. For swept frequency measurements, the input impedance of the mismatched transmission line would vary with frequency as the electrical length of the transmission line would

   A. Decrease with frequency
   B. Remains same with change in frequency
   C. Increase with frequency
   D. Either A. or B.

2. For an SCR gate – cathode characteristic is a straight line of 130. For triggered source volume of 15 V and allowable gate power dissipation of 0.5 W compute the gate source resistance_____?

   A. 111.9 Ω.
   B. 11.19 Ω.
   C. 108 Ω.
   D. 115 Ω

3. Any electrical signal present in a circuit other than the desired signal is known as______________?

   A. Noise
   B. Distortion
   C. Interference
   D. All of these

4. Under over voltage condition impedance offered by the voltage clamping device is__________?

   A. low
   B. High
   C. moderate
   D. infinity

5. Under normal operating condition voltage clamping device offers impedance of_________?

   A. high value.
   B. low value.
   C. zero value.
   D. moderate value.

6. Due to non sinusoidal waveform of the input current, the power factor of the rectifier is____________?

   A. Negatively affected by firing angle
   B. Negatively affected by distortion of the input current
   C. Positively affected by both firing angle and distortion of the input current
   D. Both (a) and (b)

7. In the SPWM, the modulating signal is___________?

   A. Square
   B. Sinusoidal
   C. Triangular
   D. Saw – tooth

8. The phase angle of gate signal in TRIAC can be shifted by using_____________?

   A. A capacitor
   B. A variable resistor
   C. An inductor
   D. Only (a) and (b)

9. In a 3 phase VSI SPWM to use a single carrier signal and preserve the features of PWM technique, the normalized carrier frequency should be____________?

   A. Multiple of two
   B. Odd multiple of three
   C. Odd multiple of five
   D. Odd multiple of seven

10. Advantages of HVDC transmission over AC system is / are____________?

    a. Reversal of power can be controlled by firing angle
    b. Very good dynamic behavior
    c. They can link two AC system operating unsynchronized
    d. All of these