NEET Physics: Questions 1637 - 1642 of 2099

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Passage

A student performs an experiment for drawing the static characteristic curve of a triode valve in the laboratory. The following data were obtained from the linear portion of the curves:

Data obtained from the linear portion of curve

List of data obtaining from liner portion of curve of static characteristic curve of a triode

Grid voltage V g (Volt)

-2.0

-3.5

-2.0

Plate voltage V p (Volt)

180

180

120

Plate current I P (mA)

15

7

10

Question number: 1637 (1 of 3 Based on Passage) Show Passage

» Electronic Devices » Semiconductor Diode

MCQ▾

Question

Calculate the plate resistance r p of the triode valve?

Choices

Choice (4) Response
a.

0.12 × 10 4 ohm

b.

1.2 × 10 4 ohm

c.

1.3 × 10 4 ohm

d.

1.4 × 10 4 ohm

Question number: 1638 (2 of 3 Based on Passage) Show Passage

» Electronic Devices » Semiconductor Diode

MCQ▾

Question

Calculate the mutual conductance (g m) of the triode valve?

Choices

Choice (4) Response
a.

5.00 × 10 -3 ohm -1

b.

5.33 × 10 -3 ohm -1

c.

4.32 × 10 -3 ohm -1

d.

53.3 × 10 -3 ohm -1

Question number: 1639 (3 of 3 Based on Passage) Show Passage

» Electronic Devices » Semiconductor Diode

MCQ▾

Question

Calculate the amplification factor μ of the triode valve?

Choices

Choice (4) Response
a.

62

b.

54

c.

52

d.

64

Question number: 1640

» Oscillations and Waves » Simple Pendulum

MCQ▾

Question

If a simple pendulum oscillates with amplitude of 30 mm and time period of 5 sec, then its maximum velocity is

Choices

Choice (4) Response
a.

0.28ms

b.

0.16ms

c.

0.037ms

d.

0.028ms

Question number: 1641

» Oscillations and Waves » Periodic Motion - Period Frequency

Assertion-Reason▾

Assertion (Ꭺ)

The periodic time of a hard spring is less compared to that of a soft spring.

Reason (Ꭱ)

The periodic time depends upon the spring - constant, and spring constant is large for hard spring.

Choices

Choice (4) Response
a. Ꭺ is false but Ꭱ is true
b. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
c. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
d. Both Ꭺ and Ꭱ are false

Question number: 1642

» Electronic Devices » Semiconductor Diode

MCQ▾

Question

Two PN-j unctions can be connected in series by three different methods as shown in the figure. If the potential difference in the junctions is the same, then the correct connections will be

Two PN junctions connected in series.

Two PN Junctions Connected in Series.

In figure two PN junctions are connected in series by three different methods.

Choices

Choice (4) Response
a.

In the circuit (1) and (2)

b.

In the circuit (2) and (3)

c.

In the circuit (1) and (3)

d.

Only in the circuit (1)

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