In Schottky barrier diode, which contact has similar characteristics to that of an ordinary PN diode?

Consider the following diodes: 1. Gunn diode 2. Schottky diode 3. Crystal diode 4. Tunnel diode Which of these can be used as detector diodes?

A

1 and 2 only

B

2 and 4 only

C

3 and 4 only

D

1, 2, 3 and 4

Schottky barrier diode is a sophisticated version of the point contact ______________

A

Germanium diode

B

Silicon crystal diode

C

GaAs diode

D

None of the mentioned

There are two sets given below in which Set I offers types of learner's characteristics and Set II gives their description. Match the two sets: Set I (Learner’s Characteristics) Set II (Description) a. Academic Characteristics i. Learner encodes and decodes relevant messages correctly b. Social Characteristics ii. Learner selects different themes in his/her course when needed c. Emotional Characteristics iii. Learner works as a team member of the peers d. Cognitive Characteristics iv. Learner starts respecting the individual differences evident in likes and dislikes of members of his class Choose the correct answer from the following options:

A

a - ii, b - iv, c - i, d - iii

B

a - i, b - ii, c - iii, d - iv

C

a - ii, b - iii, c - iv, d - i

D

a - iii, b - i, c - ii, d - iv

What is the price range of ordinary wall clocks ? I. The price range of ordinary wrist watches of company X is Rs 400 to Rs 600. II. The price range of ordinary wall clocks of company X is 50 percent that of their ordinary watches.

A

If the data in statement I alone are sufficient to answer the question

B

If the data in statement II alone are sufficient answer the question

C

If the data either in I or II alone are sufficient to answer the question;

D

If the data even in both the statements together are sufficient to answer the question

Consider the following statements: In case of helical gears, teeth are cut at an angle to the axis of rotation of the gears. 1) Helix angle introduces another ratio called axial contact ratio. 2) Transverse contact ratio is equal to axial contact ratio in helical gears. 3) Large transverse contact ratio does not allow multiple teeth to share the load. 4) Large axial contact ratio will cause larger axial force component Which of the above statements are correct?

A

1 and 2

B

2 and 3

C

1 and 4

D

3 and 4

Schottky defects are observed in solids with cations and anions of similar sizes. Which of the following compounds, therefore, is NOT likely to have a Schottky defect?

A

NaCl

B

AgCl

C

CsCl

D

KCl

The Schottky-barrier diode has:

A

one PN junction

B

two PN junction

C

three PN junction

D

four PN junction

E

no PN junction

The Schottky-barrier diode has

A

no PN junction

B

one PN junction

C

two PN junction

D

three PN junction

Which of the following is not true for a Schottky-Barrier Diode (SBD)?

A

It is formed by bringing metal into contact with a moderately doped n-type semiconductor material.

B

In the SBD, current is conducted by mainly by minority carriers.

C

The forward voltage drop of a conducting SBD is lower than that of a pn-junction diode.

D

SBD are used in the design of a special form of bipolar-transistor logic circuits

The number of leads in schottky barrier diode are

A

Four

B

Three

C

Two

D

Six

In Schottky barrier diode, which contact has similar characteristics to that of an ordinary PN diode?

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