# Computer Science Electronic Principles Online Test – Set 04

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## Q1. A device that converts chemical energy to electrical energy is called a:

(A) Solar cell
(B) Thermocouple
(C) Chemical cell
(D) Electric device

(A) 28.4 mA
(B) 24.2 mA
(C) 34.4 mA
(D) 68.4 mA

## Q3. When operating above its resonant frequency, a parallel RLC circuit has the characteristics of a:

(A) Parallel RL circuit
(B) Parallel RC circuit
(C) Parallel RLC circuit operated above its resonant frequency
(D) Purely resistive circuit

## Q4. Which one of the following statements is true?

(A) Inductive reactance decreases with operating frequency
(B) Inductive reactance is at a maximum for dc source voltages
(C) Inductive reactance increases with operating frequency
(D) There is no meaningful relationship between inductive reactance and operating frequency

Answer: (C) Inductive reactance increases with operating frequency

## Q5. A typical light switch in your home is a:

(A) Knife switch
(B) Toggle switch
(C) Rotary switch
(D) Momentary push button switch

## Q6. When the Q point moves along the load line, the voltage increases when the current

(A) Decreases
(B) Stays the same
(C) Increases
(D) Can be any of above

## Q7. A resistor has a rated value of 100 ohm and a tolerance of 10%. What is its minimum and maximum allowable resistance value?

(A) 90 Ohm – 101 ohm
(B) 90 Ohm – 110 ohm
(C) 98 Ohm – 100.1 ohm
(D) 99 Ohm – 102 ohm

Answer: (B) 90 Ohm – 110 ohm

## Q8. The merging of a free electron and a hole is called

(A) Covalent bonding
(C) Recombination
(D) Thermal energy

## Q9. What is the smallest number of polarities required for current flow?

(A) One – a negative terminal
(B) Two – a negative terminal and a positive terminal
(C) Three – negative, positive and neutral terminals
(D) Four – two negative and two positive

Answer: (B) Two – a negative terminal and a positive terminal

## Q10. For normal operation of the transistor, the collector diode has to be

(A) Forward-biased
(B) Reverse-biased
(C) Non-conducting
(D) Operating in the breakdown region

(A) 700 V
(B) 707 V
(C) 651 V
(D) 208 V

## Q12. Norton’s theorem replaces a complicated circuit facing a load by an

(A) Ideal voltage source and parallel resistor
(B) Ideal current source and parallel resistor
(C) Ideal voltage source and series resistor
(D) Ideal current source and series resistor

Answer:(B) Ideal current source and parallel resistor

(A) R = E2/P
(B) P = PR
(C) P = E2/R
(D) I = P/E

## Q14. The current gain of a transistor is defined as the ratio of the collector current to the

(A) Base current
(B) Emitter current
(C) Supply current
(D) Collector current

## Q15. When applying a square waveform to a capacitor, the circuit tends to:

(A) Peak the voltage and round off the current waveforms
(B) Peak the current and round off the voltage waveforms
(C) Round off both the voltage and current waveforms
(D) Peak both the voltage and current waveforms

Answer: (B) Peak the current and round off the voltage waveforms

## Electronic Principles MCQ – All Set

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