ECAT Pre Engineering Physics Chapter 18 MCQ Test With Answer

Top Scorers Of Physics ECAT Pre Engineering Chapter 18 Electronics Physics MCQ`s Test

Sr.#	Question	Answer
1	A digital system deals with quantities which has discrete values:	A. Two in number B. One in number C. Three in number D. Four in number
2	The SI unit of charge is	A. Ampere B. Watt C. Coulomb D. Volt
3	Inverter is the name given to:	A. NOT gate B. OR gate C. NOR gate D. AND gate
4	To turn the transistor OFF, the base current is set:	A. At maximum value B. At zero C. Either (A) or (B) D. All are correct
5	To make an LED, it is impreacticable to use:	A. Silicon B. Gallium arsenide C. Gallium arsenide phosphide D. Iron
6	The concept of electric field theory was introduced by	A. Michael Faraday B. Newton C. Dalton D. Kepler
7	Silicon is one of the mot commonly used:	A. onductor B. Dielectric C. Insulator D. Semiconduction
8	All the valence electrons present in a crystal of silicon are bound in their orbits by	A. Ionic bond B. covalent bond C. Molecular bond D. Both (A) and (B)
9	A diode which can turn its current ON and OFF in nono seconds is called:	A. LED B. Photodiode C. An ordinary diode. D. Both (A) and (B)
10	Crystal of germanium or silicon in its pure form at absolute zero acts as:	A. A conductor B. A semiconductor C. an insulator D. Both (A) and (C)