# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1246 - 1250 of 2184

Access detailed explanations (illustrated with images and videos) to 2184 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. Subscription can be renewed yearly absolutely FREE! View Sample Explanation or View Features.

Rs. 550.00 or

How to register?

## Question number: 1246

Edit
MCQ▾

### Question

A hydrogen atom moving at a speed v absorbs a photon of wavelength 122 nm and stops. Find the value of v. (Mass of hydrogen atom = 1.67 × 10 -27 kg)

### Choices

Choice (4) Response

a.

3.5 m/s

b.

3.05 m/s

c.

32.5 m/s

d.

3.25 m/s

## Question number: 1247

Edit
Assertion-Reason▾

### Assertion (Ꭺ)

A large soap bubble expands while a small bubble shrinks, when they are connected to each other by capillary tube.

### Reason (Ꭱ)

The excess pressure inside bubble (or drop) is inversely proportional to the radius.

### Choices

Choice (4) Response

a.

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

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

## Question number: 1248

Edit
MCQ▾

### Question

Water is filled in a cylindrical container to a height of 3m. The ratio of the cross-sectional area of the orifice and the beaker is 0.2. The square of the speed of the liquid coming out from the orifice at height 0.525 is, (g = 10m/s 2)

### Choices

Choice (4) Response

a.

51.56 m 2 /s 2

b.

52.43. m 2 /r

c.

50.55 m 2 /s 2

d.

50.64 m 2 /s 2

## Question number: 1249

Edit
MCQ▾

### Question

A brass rod is to support a load of 400 N. If its elastic limit is 4.0 × l0 8 N/m 2 its minimum diameter must be -

### Choices

Choice (4) Response

a.

1.13mm

b.

4.52mm

c.

3.71mm

d.

2.26mm

## Question number: 1250

Edit
MCQ▾

### Question

In an experiment similar to Young’s experiment, interference is observed using waves associated with electrons. The electrons are being produced in an electron gun. In order to decrease the fringe width,

(1) Electron gun voltage be increased.

(2) The slits be moved away from each other

(3) The screen be moved closer to interfering slits.

(4) Electron gun voltage be decreased.

Select the correct answers and mark it according to the following codes:

Codes:

### Choices

Choice (4) Response

a.

1,2 and 3 are correct

b.

1 and 2 are correct

c.

1 and 3 are correct

d.

2 and 4 are correct