ECAT Pre Computer Science Chapter 18 online mcq test with answers for Physics chapter 18 (Electronics)

ECAT Physics Chapter 18 Electronics Online Test

Sr. #	Questions	Answers Choice
1	Electric lines of force	Intersect each other Are always parallel Are always anti-parallel Never intersect None of these
2	The electric field lines start from	Positive charge Negative charge Either A or B Neutron An atom
3	The SI unit of charge is	Ampere Watt Coulomb Volt Joule
4	The intensity at a point due to a charge is inversely proportional to	Amount of charge Size of the charge Distance between charge and the point Square of the distance from the charge None of these
5	Electric intensity at a place due to a charged conductor is a	Scalar quantity Vector quantity Semi vector and semi scalar Dimensionless quantity Both A and D are true
6	Electric field strength is defined as	Work done on unit charge Force exerted on unit charge Distance covered by unit charge Power exerted by unit charge None of these
7	Michael Faraday is known by his work on	Nuclear strong force Gravitational force Nuclear weak force Electric force None of these
8	The concept of electric field theory was introduced by	Michael Faraday Newton Dalton Kepler Einstein
9	Origin of the electric and the gravitational forces	Was known in 1911 A.D. Was known in 1811 A.D. Was known in 1711 A.D. is still unknown Was known in 1611 A.D.
10	If the distance between two charges is doubled, the force between them will become	Double Half Three times One fourth One third
11	In a transistor, collector current is controlled by	Collector voltage Base current Collector resistance All of the above
12	Most of the electrons in the base of an NPN transistor flow	Out of the base lead Into the collector Into the emit Into the base supply
13	When transistors are used in digital circuits they usually operate in the	Active region Breakdown region Saturation and cutoff regions Linear region
14	Improper biasing of a transistor circuit produces	Heavy loading of emitter current Distortion in the output signal Excessive heat at collector terminal Faulty location of load line
15	The reverse saturation current in a PN junction diode is only due to	Majority carriers Minority Carriers Acceptor ions Donor ions

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