Help me answer some board exam questions

[umang]

Please do answer the following questions, if ny1 knew it....

> the internal resistance of the ammeter is.....

> hay bridge is used for the measurement of ....

> when modulation frequency is doubled, modulation index is halved and the modulation voltage remains constant, the type of modulation is called.....

> impedance inversion may be obtained with:
-short circuited stud
-open circuited stud
-quarter wave line
-half wave line

> high frequency waves are:
-observed at F2 layer
-reflected by D layer
-capable of long distance communication
-affected by solar cycle

> signal strength received by geosychronous satellites is of order of:
-milliwatts
-watts
-pico watts
-killo watts

> class B amplifier is biased:
-just above the load line
-just at cut off
-nearly twice the cut off
-at midpoint of load line
-so that Ib equals Ic

 

[dexter_ex_2ks]

Re: pls do reply

Hay bridge it is used for inductance measurements.

Signal strength for satellites is the order of milliwatts. it is verry weak an d it is needed low noise and big amplification.

 

[umang]

Re: pls do reply

> which capacitor has the lowest leakage current??

 

[lsimeon]

Re: pls do reply

Please do answer the following questions, if ny1 knew it....

> the internal resistance of the ammeter is.....
--> very low

> hay bridge is used for the measurement of ....
-->inductance

> when modulation frequency is doubled, modulation index is halved and the modulation voltage remains constant, the type of modulation is called.....
-->frequency modulation

> impedance inversion may be obtained with:
-short circuited stud
-open circuited stud
-quarter wave line
-half wave line

> high frequency waves are:
-observed at F2 layer
-reflected by D layer

capable of long distance communication

-affected by solar cycle

> signal strength received by geosychronous satellites is of order of:
-milliwatts
-watts
-pico watts
-killo watts

> class B amplifier is biased:
-just above the load line
-just at cut off
-nearly twice the cut off
-at midpoint of load line
-so that Ib equals Ic

i hope that my answers will help you on your board exam on saturday....
goodluck....
what review center are you enrolled?