# Electronic Principles Objective Practice Test – Set 02

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(A) 0
(B) 1
(C) 2
(D) 4

## Q2. Which one of the following statements is true for the voltages in a series RL circuit?

(A) The total voltages is equal to the sum of the voltages across the resistance and inductance
(B) The voltage always has the same amplitude and phase for every part of the circuit
(C) The total voltage is less than the sum of the voltages across the resistance and inductance
(D) The total voltage lags the total current by less than 90

Answer: (C) The total voltage is less than the sum of the voltages across the resistance and inductance

(A) 200 mW
(B) 300 mW
(C) 20 mW
(D) 10 mW

## Q4. If a load resistance is 1 kW, a stiff voltage source has a resistance of

(A) At least 10 Ohm
(B) Less than 10 Ohm
(C) More than 100 k Ohm
(D) Less than 100 k Ohm

Answer: (B) Less than 10 Ohm

(A) Down
(B) Up
(C) Nowhere

## Q6. The north pole of a magnet is the one:

(A) That has its molecules arranged in a random pattern
(B) That would be attracted to the earth’s north magnetic pole
(C) That would be repelled by the south pole of another magnet
(D) That would be attracted to the earth’s south magnetic pole

Answer: (B) That would be attracted to the earth’s north magnetic pole

## Q7. The Thevenin resistance is equal in value to the

(C) Internal resistance of a Morton circuit

## Q8. A basic capacitor is composed of:

(A) Two conductors separated by a dielectric
(B) Two dielectrics separated by a conductor
(C) Two coils separated by a dielectric
(D) Two coils separated by a conductor

Answer: (A) Two conductors separated by a dielectric

## Q9. Current and voltage are said to be in phase when:

(A) Their waveforms are both ac or both dc
(B) They have the same amplitude and frequency
(C) Their waveforms cross through zero and reach positive and negative peaks at the same time
(D) None of the above

Answer: (C) Their waveforms cross through zero and reach positive and negative peaks at the same time

## Q10. The total impedance of a series RLC circuit:

(A) Is minimum at the resonant frequency
(B) Always increases as the applied frequency increases
(C) Always decreases as the applied frequency increases
(D) Is maximum at the resonant frequency

Answer: (A) Is minimum at the resonant frequency

## Q11. Which one of the following statements regarding ac circuits is correct?

(A) Current and voltage are in phase through an inductor
(B) Current leads the voltage through an inductor
(C) Current lags the voltage through an inductor
(D) None of the above

Answer: (C) Current lags the voltage through an inductor

## Q12. Holes act like:

(A) Atoms
(B) Crystals
(C) Negative charges
(D) Positive charges

## Q13. The period of a waveform is:

(A) The time required to complete one full cycle
(B) The number of cycles completed in one second
(C) The time required for the voltage to rise from 10% to 90% of the peak amplitude
(D) Equal to 0.707 times the peak amplitude

Answer:(A) The time required to complete one full cycle

## Q14. Which one of the following statements applies to common, non-rechargeable flashlight batteries?

(A) Common flashlight batteries are secondary wet-cell batteries
(B) Common flashlight batteries are primary wet-cell batteries
(C) Common flashlight batteries are primary dry-cell batteries
(D) Common flashlight batteries are secondary dry-cell batteries

Answer: (C) Common flashlight batteries are primary dry-cell batteries

(A) 12 V
(B) 18 V
(C) 24 V
(D) 30 V