# Computer Test Electronic Principles – Set 08

PDF Free Download as per computer science new exam pattern? You came to the right page. This may assist you to understand and check your knowledge about the Subjects. Students also can take a free test of the Multiple Choice Questions of computer science. Each question has four options followed by the right answer. These computer science MCQ Questions are selected supported by the newest exam pattern.

## Q1. How much current flows through a 0.02 micro F capacitor that is operating from a 12-V ac, 100-Hz source?

(A) 0.151 mA
(B) 157 mA
(C) 0.995 mA
(D) 2.02 A

Answer: (A) 0.151 mA

## Q2. Which one of the following is a statement of Kirchhoffs current law?

(A) The current through a resistance is proportional to the value of resistance and the IR drop across it
(B) The total current in a parallel circuit is less than the value of the smallest current
(C) The algebraic sum of currents in a loop is equal to zero
(D) The algebraic sum of currents entering and leaving a point is equal to zero

Answer: (C) The algebraic sum of currents in a loop is equal to zero

(A) Armature
(B) Brush
(C) Commutator
(D) Loop

## Q4. To get the Thevenin voltage, you have to

(A) Short the load resistor
(B) Open the load resister
(C) Short the voltage source
(D) Open the voltage source

## Q5. What is the difference between the kinds of charges for an electron and a proton?

(A) An electron has a positive charge and a proton has no charge
(B) An electron has a positive charge and a proton has a negative charge
(C) An electron has a negative charge and a proton has a positive charge
(D) An electron has a negative charge and a proton has no charge

Answer: (C) An electron has a negative charge and a proton has a positive charge

(A) 10.738
(B) 0.707
(C) 1.5
(D) 0.575

## Q7. A current source has an internal resistance of 100 kW. What is the largest load resistance if the current source must appear stiff?

(A) 2 k Ohm
(B) 10 k Ohm
(C) 20 k Ohm
(D) 1 k Ohm

Answer: (D) 1 k Ohm

## Q8. Doubling the diameter of the coil in an inductor:

(A) Multiplies the value of inductance by two
(B) Reduces the value of inductance by one-half
(C) Reduces the value of inductance by one-fourth
(D) Multiplies the value of inductance by four

Answer: (A) Multiplies the value of inductance by two

## Q9. The direction of electron current flow is:

(A) From right to left
(B) From positive to negative
(C) From negative to positive
(D) From neutral to positive

Answer: (C) From negative to positive

## Q10. A transistor has a current gain of 125 and a base current of 30 µA. What is the collector current?

(A) 3.75 mA
(B) 3.2 mA
(C) 0.05 mA
(D) 13 mA

Answer: (A) 3.75 mA

(A) 0
(B) +1
(C) -1
(D) +4

## Q12. One henry of inductance is defined as:

(A) The amount of counter emf required to reduce a current to 1 A
(B) The amount of inductance required for generating 1 V of counter emf when the current changes at the rate of 1 A per second
(C) The amount of inductance required to change the frequency of a current by 1 Hz
(D) The number of turns of wire in an inductor multiplied by the amount of current flowing through it

Answer: (B) The amount of inductance required for generating 1 V of counter emf when the current changes at the rate of 1 A per second

(A) Voltmeter
(B) Ohmmeter
(C) Ammeter
(D) Wattmeter

(A) 81
(B) 85
(C) 6
(D) 9

## Q15. 1 Microfarad is the same as:

(A) 1 millionth of a picofarad