Assertion (A): A JFET can be used as a current source.<br>Reason (R): In beyond pinch off region the current in JFET is nearly constant.

Assertion (A): A JFET can be used as a current source.Reason (R): In beyond pinch off region the current in JFET is nearly constant.

A

Both A and R are true and R is correct explanation of A

B

Both A and R are true but R is not a correct explanation of A

C

A is true but R is false

D

A is false but R is true

Consider the following statements regarding n-channel JFET: 1. The maximum drain current IDSS occurs when gate-to-source voltage VGS = 0 V and drain-to-source voltage VDS ≥ |VP|. (VP is pinch-off voltage). 2. For gate-to-source voltage VGS less than the pinch-off level, the drain current is 0 A. 3. For all levels of VGS between 0 V and the pinch-off level, the current ID will range between IDSS and 0 A, respectively. which of the above statements are correct ?

A

1 and 2 only

B

1 and 3 only

C

1, 2 and 3

D

2 and 3 only

Consider the following statements regarding JFET: 1. The relationship between the drain current and gate-to-source voltage of a JFET is a nonlinear. 2. The minimum current for JFET occurs at pinch-off voltage defined by VGS = VP. 3. A current controlled device is one in which a current defines the operating conditions of the device. Which of the above statements are correct?

A

1 and 2 only

B

1 and 3 only

C

1, 2 and 3

D

2 and 3 only

When an N-channel JFET reaches pinch-off, the increase in the drain to source voltage results in shifting of the pinch-off position towards the ___________

A

Gate

B

Drain

C

Source

D

Does not shift

An assertion and a reason are given below. Assertion: The phenomenon of nuclear fission generates great energy. Reason: The process in which a nucleus is broken into two parts is called nuclear fission. Choose the answer. A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion. B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion. C. Both Assertion and Reason are false. D. Assertion is true but Reason is false.

A

B

D

C

B

D

C

For a JFET, when VDS is increased beyond the pinch off voltage, the drain current

A

Increases

B

Decreases

C

Remains constant

D

First decreases and then increases

The pinch off voltage of JFET is 5v. What is its cut off voltage?

A

2.5V

B

3V

C

4V

D

5V

Last year, there were three sections in a competitive exam. Out of them 33 students cleared the cut-off in Section A, 34 students cleared the cut-off in Section B and 32 students cleared the cut-off in Section C. 10 students cleared the cut-off in section A and section B, 9 cleared the cut-off in section B and section C and 8 cleared the cut-off in section A and section C. The number of students who cleared only one section was equal and was 21 for each section. How many students cleared all the three sections?

A

6

B

9

C

8

D

7

The Indian rupee for the first time weakened past the 73 mark against the US dollar after the crude oil prices surged to nearly $85 per barrel. INR is currently the worst performing Asian currency as India imports nearly 80% of its fuel needs. Which of the following is not-in-line with the above statement? I: The crude oil prices surged to nearly $85 per barrel. II: The Indian rupee for the first time weakened past the 73 mark against the US dollar. III: India exports nearly 80% of its fuel needs.

A

Only III

B

Only II

C

Only II and III

D

Only I and II

E

All of the above

The pinch-off voltage in a JFET is analogous to ___________ voltage in a vacuum tube

A

anode

B

cathode

C

grid cut off

D

none of the above

Assertion (A): A JFET can be used as a current source.
Reason (R): In beyond pinch off region the current in JFET is nearly constant.

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