what is the frequency of DC ?

1 Answer

Frequency of DC is zero.
Like 0 like Dislike 0 dislike


Description : separately excited dc motor controlled by chopper with a frequency of 500hz and source voltage of 230v and rated value of motor is 220v 24A 100 rpm find its duty ratio at 1.2 times rated torgue and 500rpm

Description :  When The dc converter in figure shown has a resistance load of R = 10 Ω and the input voltage is Vs 220 V the converter switch remains on, its voltage drop is Vo -2 V. The chopping ... ) the RMS output voltage Vo (c) the converter efficiency (d) the effective input resistance of the converter

Description : In an isolated output dc-to-dc fly back converter, the high frequency transformer used works as an inductor (a) during turn -on period of the switching device (b) during turn off period of the switching device (c) during both (d) none of these

Description : Draw the frequency response of DC amplifier. Comment on it.

Answer : frequency response: Comment : The gain remains constant at its midband value AM down to zero frequency (DC). Directcoupled amplifiers do not suffer gain reduction at low frequencies as compared ... , gain falls off at the high frequency end due to the internal capacitances of the transistor.

Description : Give any four advantages of voice frequency signaling over DC signaling system. 

Answer : Advantages of Voice Frequency Signaling Over DC Signaling System: 1. Large number of circuits can be easily derived over a single pair of wires (single pair can control 18 stations). 2. Signal ... used over long distances. 5. Can be used where large number of equipment can be controlled. 

Discuss Now ← Prev Page Next Page →