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## Q1. Which one of the following statements is true for resistance in a parallel circuit?

(A) The total resistance is equal to the sum of the individual resistances in a parallel circuit

(B) The total resistance of a parallel circuit is always less than the value of the smallest resistance

(C) The total resistance of a parallel circuit is equal to the total voltage

(D) The total resistance in a parallel circuit is equal to the average value of the individual resistances

Answer: (B) The total resistance of a parallel circuit is always less than the value of the smallest resistance

## Q2. Which one of the following statements is true for current flowing in a parallel circuit?

(A) The amount of current flow through each branch of a parallel circuit can be different, depending on the resistance of each branch part and the amount of voltage applied to it

(B) The same current always flows through every part of a parallel circuit

(C) The total current in a parallel circuit is equal to the total voltage multiplied by the total resistance

(D) The total current in a parallel circuit is always less than the smallest amount of current

Answer: (A) The amount of current flow through each branch of a parallel circuit can be different, depending on the resistance of each branch part and the amount of voltage applied to it

## Q3. The saturation point is approximately the same as

(A) Cutoff point

(B) Lower end of the load line

(C) Upper end of the load line

(D) Infinity

Answer: (C) Upper end of the load line

## Q4. What are the main parts of an atom?

(A) Protons only

(B) Electrons, protons, and ions

(C) Electrons, ions, and neutrons

(D) Electrons, protons, and neutrons

Answer: (D) Electrons, protons, and neutrons

## Q5. A transistor has how many doped regions?

(A) 1

(B) 2

(C) 3

(D) 4

Answer: (C) 3

## Q6. The component that forms the electrical connection between the rotating coil of wire in a motor and the external source of electrical energy is called the:

(A) Rotor

(B) Armature

(C) Battery

(D) Commutator

Answer: (D) Commutator

## Q7. The number of free electrons and holes in intrinsic semiconductor increases when the temperature

(A) Decreases

(B) Increases

(C) Stays the same

(D) 0o C

Answer: (B) Increases

## Q8. What is the phase shift between total current and voltage, if 100 ohm resistor connected in parallel with an inductor that has a reactance of 200W?

(A) 0 degree

(B) 26.6 degree

(C) 90 degree

(D) 180 degree

Answer: (B) 26.6 degree

## Q9. The total impedance of a parallel RLC circuit:

(A) Always increases as the applied frequency increases

(B) Is equal to the sum of the values of resistance, inductive reactance and capacitive reactance

(C) Always decreases as the applied frequency increases

(D) Is maximum at the resonant frequency

Answer: (D) Is maximum at the resonant frequency

## Q10. A high-pass filter:

(A) Passes lower-frequency signals and reduces higher-frequency signals

(B) Passes higher-frequency signals and reduces lower-frequency signals

(C) Has no effect on ac signals

(D) Increases the level of all frequencies by a significant amount

Answer:(B) Passes higher-frequency signals and reduces lower-frequency signals

## Q11. Which one of the following is a direct statement of Ohm’s law?

(A) The voltage drop across a resistance is proportional to the value of resistance and the amount of current flowing through it

(B) The total resistance of a parallel circuit is less than the value of the smallest resistance

(C) The algebraic sum of voltages in a loop is equal to zero

(D) The algebraic sum of currents entering and leaving a point is equal to zero

Answer: (A) The voltage drop across a resistance is proportional to the value of resistance and the amount of current flowing through it

## Q12. Which one of the following statements is true for voltage in a parallel circuit?

(A) The total voltage in a parallel circuit is equal to the average value of the individual voltages

(B) The total voltage in a parallel circuit is always less than the value of the smallest voltage

(C) The total voltage is equal to the sum of the voltages across the individual branches in a parallel circuit

(D) The total voltage of a parallel circuit is the same as the voltages across each branch

Answer: (D) The total voltage of a parallel circuit is the same as the voltages across each branch

## Q13. What kind of battery is most likely included in a cordless electric knife?

(A) Zinc-carbon battery

(B) Mercury-cell battery

(C) Nicad battery

(D) Lead-acid battery

Answer: (B) Mercury-cell battery

## Q14. Which one of the following kinds of materials has the lowest permeability?

(A) A diamagnetic material

(B) A paramagnetic material

(C) A ferromagnetic material

(D) All of the above

Answer: (A) A diamagnetic material

## Q15. Current is

(A) The flow of charged particles through a material

(B) An imbalance of electrical charges

(C) The force that causes electrons to flow

(D) The number of free electrons in an atom

Answer: (A) The flow of charged particles through a material

## Electronic Principles MCQ – All Set

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