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	Electric intensity at a place due to a charged conductor is a	A. Scalar quantity B. Vector quantity C. Semi vector and semi scalar D. Dimensionless quantity
2	When transistors are used in digital circuits they usually operate in the	A. Active region B. Breakdown region C. Saturation and cutoff regions D. Linear region
3	To make an LED, it is impreacticable to use:	A. Silicon B. Gallium arsenide C. Gallium arsenide phosphide D. Iron
4	To designate the voltage as low or 0 by a logic gate, the specified minimum value is:	A. 0.2 volt B. 0.8 volt C. 0 volt D. 2.0 volt
5	A hole in p-type my be due to:	A. Trivalent impurity B. Breking of some covalent bond C. Pentavalent impurity D. Germanium
6	Inverter is the name given to:	A. NOT gate B. OR gate C. NOR gate D. AND gate
7	In AND gate, the output is 1 if:	A. Both inputs are 0 B. Both inputs are 1 C. Only one input is 0 D. Both (A) and (B)
8	In an N-type silicon, which of the following statement is true	A. Electrons are majority carriers and trivalent atoms are the dopants B. Electrons are minority carriers and pentavalent atoms are the dopants C. Holes are minority carriers and pentavalent atoms are the dopants D. Holes are majority carriers and trivalent atoms are the dopants
9	.Depletion region contains:	A. Protons B. Positive ions C. Negative ions D. Both (B) and (C)
10	Field lines are closer to each other in the region where the filed is	A. Stronger B. Weaker C. Much weaker D. Absent