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	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)
2	In reverse-biased p-n junction, the reverse current is due to flow of:	A. Minority charge carriers B. Majority charge carriers C. Free electrons from p to n-region D. Holes from n to p-region
3	The use of chips in electrons is described in the form of:	A. Yellow boxes B. Black boxes C. Red boxes D. White boxes
4	By placing a dielectric in between the charges, the electrostatic force between them	A. Is always reduced B. Is always increased C. Is not affected D. Is increased one million times
5	An LED emits light when it is:	A. Forward biased B. Reverse biased C. Operated without battery D. Operated with heat source
6	Electric field strength is defined as	A. Work done on unit charge B. Force exerted on unit charge C. Distance covered by unit charge D. Power exerted by unit charge
7	To display a digit of EIGHT, the number of ON LED'S are:	A. Two B. Three C. Five D. Seven
8	The number of input terminals of an op-amp is:	A. One B. Two C. Three D. Four
9	Electric lines of force	A. Intersect each other B. Are always parallel C. Are always anti-parallel D. Never intersect
10	The concept of electric field theory was introduced by	A. Michael Faraday B. Newton C. Dalton D. Kepler