function questionFetcher(Q) { var T = new Array(); T[1]="

State the energy changes in a
(a) microphone
(b) loudspeaker(2)

"; T[2]="

What does the mouthpiece of a telephone contain?(1)

"; T[3]="

Which of the above signals produces the
(a) the highest frequency
(b) the loudest sound wave?(2)

"; T[4]="

A telephone signal is transmitted 8 km between two towns.

Calculate the time it takes the signal to travel this distance. (3)

"; T[5]="

Complete the diagram shown above for an optic fibre.

Show the path taken by the ray. (2)

"; T[6]="

State two advantages of using optical fibre over electrical cable.(2)

"; T[7]="

A signal travels at 200,000,000 m/s for 6 ms through an optic fibre.

Calculate the distance travelled.(2)

"; T[8]="

Complete the diagram showing the path of the ray.(2)

"; T[9]="

Which ray A, B or C is most likely to show \"Total Internal Reflection\"?(1)

"; T[10]="

Describe a practical use of optical fibres in telecommunication.(1)

"; T[11]="Draw a block diagram showing the main parts of a radio receiver.(2)

"; T[12]="

Describe the function of the
(a) tuner
(b) amplifier
in a radio receiver.(2)

"; T[13]="

Draw an oscilloscope pattern for a
(a) sound wave
(b) radio wave
(c) modulated radio wave(3)

"; T[14]="

Describe the function of the tube in a TV.(1)

"; T[15]="

Describe how bright areas are produced on the screen of a black and white TV.(1)

"; var Im = new Array(); Im[1]="jpg"; Im[2]="jpg"; Im[3]="jpg"; Im[4]="jpg"; Im[5]="jpg"; Im[6]="jpg"; Im[7]="jpg"; Im[8]="jpg"; Im[9]="jpg"; Im[10]="jpg"; Im[11]="jpg"; Im[12]="jpg"; Im[13]="jpg"; Im[14]="jpg"; Im[15]="jpg"; document.open(); document.write(""); document.write(""); document.write("Telecom Revision Quiz2 Question "+Q+""); document.write(""); document.write(""); document.write("

Q"+Q+".

"); document.write(T[Q]); document.write("

"); W=Q+1; if (W==16) document.write("Back to the start. View Answer "); else document.write("Next Question View Answer"); document.write(""); document.close(); }