# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1637 - 1642 of 2184

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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:

 Grid voltage V g (Volt) -2 -3.5 -2 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

Edit
MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

53.3 × 10 -3 ohm -1

b.

4.32 × 10 -3 ohm -1

c.

5.33 × 10 -3 ohm -1

d.

5.00 × 10 -3 ohm -1

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

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

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MCQ▾

### Question

Calculate the plate resistance r p of the triode valve?

### Choices

Choice (4) Response

a.

1.2 × 10 4 ohm

b.

1.3 × 10 4 ohm

c.

0.12 × 10 4 ohm

d.

1.4 × 10 4 ohm

## Question number: 1640

Edit
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.

b.

c.

d.

## Question number: 1641

Edit
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 true but Ꭱ is false

b.

Ꭺ is false but Ꭱ is true

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Both Ꭺ and Ꭱ are false

## Question number: 1642

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

### Choices

Choice (4) Response

a.

In the circuit (1) and (3)

b.

In the circuit (2) and (3)

c.

Only in the circuit (1)

d.

In the circuit (1) and (2)