# 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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