NABTEB

What is the purpose of synchronization signal? – NABTEB QUESTION

The purpose of sync-chronization signals is to keep in step, the transmitter and receiver signals so that there is agreement…

4 years ago

State FOUR picture quality of television receiver. – NABTEB QUESTION

i. Brightness ii. Contrast iii. Picture detail iv. Aspect ratio

4 years ago

What are the causes of vertical rolling in a TV receiver? – NABTEB QUESTION

i. Low main voltage ii. Improper antenna orientation iii. Detective components in integrator iv. Detective component in vertical oscillator control…

4 years ago

State FOUR advantages of transistor over a thermionic valve. – NABTEB QUESTION

S/No TRANSISTOR  THEMIONIC VALVE 1 Heat sensitive Required heat 2 Small size  Large and bulkier 3 Require very little power…

4 years ago

Explain the main differences between intrinsic and extrinsic semiconductor materials – NABTEB QUESTION

Intrinsic semiconductors: is one which is made of the semiconductors material in its extremely pure from i.e nothing has been…

4 years ago

Write short note on the following i. Open circuit ii. Short circuit – NABTEB QUESTION

OPEN CIRCUIT: Is any break in the current path that is undesired, such as a broken wire or component, or…

4 years ago

Briefly explain the operation of a stable multivibration – NABTEB QUESTION

AN ASTABLE MULTIVIBRATOR: is a type of RC oscillator that generates square or rectangular wave forms. The term astable means…

4 years ago

State two types of oscillators – NABTEB QUESTION

i. Lc sine wave oscillators ii. Hartley oscillator iii. Colpitts’ oscillators iv. Crystal oscillator v. RC sine wave oscillators

4 years ago

What is an oscillation? – NABTEB QUESTION

Oscillators are non rotating electronic device that generate device alternating current at desired frequencies. E.g an electronic organ uses oscillated…

4 years ago

What is the frequency range of radio waves used for the following purpose? (i) Broadcasting (ii) Long distance communication. (iii) Television. – NABTEB QUESTION

i. Broadcasting: MF medium frequency (0.3-3)MHz ii. Long distance communication: Beamed communication e. g. short wave comm.(3 to 30)MHz UHF…

4 years ago