Solid State Devices

161. The principal characteristics of a tunnel diode.

  1. A constant current under conditions of varying voltage
  2. A negative resistance region
  3. A very high PIV device
  4. An internal capacitance that varies with the applied voltage

Correct answer: (B)
A negative resistance region

162. The property or ability of a material to support charge flow or electron flow

  1. Resistance
  2. Conductance
  3. Resistivity
  4. Permeance

Correct answer: (B)
Conductance

163. The purpose of adding an impurity atom to an intrinsic crystal is

  1. To alter its insulating property
  2. To increase its electric conductivity
  3. To stop conduction
  4. To increase the resistivity of the semiconductor material

Correct answer: (B)
To increase its electric conductivity

164. The reason why electrons are not pulled in the positive charged nucleus is because of the _________ which usually became exactly equals the inward attraction of the nucleus.

  1. Kinetic energy
  2. Energy at rest
  3. Centrifugal force
  4. Frictional force

Correct answer: (C)
Centrifugal force

165. The reason why electrons are not pulled into the nucleus of an atom.

  1. Because of the centrifugal or outward force created by their orbital motion.
  2. Because of the force of attraction between them and the nucleus is weak.
  3. Because they are not being attracted by the positive nucleus.
  4. Because of the strong bonding between them that resists any force pulling them towards the nucleus.

Correct answer: (A)
Because of the centrifugal or outward force created by their orbital motion.

166. The reduction of power handling capability of the diode due to the increase of ambient temperature form room temperature.

  1. Maximum junction temperature
  2. Linear power derating factor
  3. Power factor
  4. Amplification factor

Correct answer: (B)
Linear power derating factor

167. The removal by electronic means of one extremity of an input waveform is called _________.

  1. Filtering
  2. Clamping
  3. Amplifying
  4. Clipping

Correct answer: (D)
Clipping

168. The resistance of a forward biased pn junction is in the order of

  1. 0
  2. mn
  3. µn
  4. kn

Correct answer: (A)
0

169. The reverse bias diode capacitance is termed as

  1. Transition region capacitance
  2. Diffusion capacitance
  3. Storage capacitance
  4. Reverse capacitance

Correct answer: (A)
Transition region capacitance

170. The semiconductor device that radiate light or utilize light are called

  1. Active devices
  2. Photoelectric devices
  3. Optoelectronic devices
  4. Passive devices

Correct answer: (C)
Optoelectronic devices

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