Electronic Principles Computer Science Questions - set 15 - ObjectiveBooks

# Practice Test: Question Set - 15

1. At cut off, the Q point is at
(A) Upper end of the load line
(B) Middle of the load line
(C) Lower end of the load line
(D) Infinity

2. How many types of flow are there in a semiconductor?
(A) 0
(B) 1
(C) 2
(D) 3

3. The total inductance of a series inductor circuit is:
(A) Equal to the sum of the individual inductance values
(B) Equal to the sum of the individual inductive-reactance values
(C) Less than the value of the smallest inductor
(D) Equal to the source voltage divided by total current

4. What form of energy is used for creating static electricity?
(A) Solar energy
(B) Mechanical energy
(C) Chemical energy
(D) Light energy

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

6. A transformer has a primary voltage of 120 V rms and a secondary voltage of 25 V rms. If the secondary current is 1A rms, what is the primary current?
(A) 7.8 mA
(B) 208 mA
(C) 200 mA
(D) 300 mA

7. A transistor has how many doped regions?
(A) 1
(B) 2
(C) 3
(D) 4

8. 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

9. A device that converts light energy to electrical energy is called a:
(A) Thermocouple
(B) Solar cell
(C) Photodiode
(D) Photo transistor

10. Holes are the minority carriers in which type of semiconductor?
(A) Extrinsic
(B) Intrinsic
(C) n-type
(D) p-type

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