NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1198 - 1201 of 5119

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Question 1198

Question MCQ▾

An incompressible liquid flows through a horizontal tube as shown in trite following fig. Then the velocity v of the fluid is

Flow of Horizontal Fluid - The Velocity V of the Fluid

Choices

Choice (4)Response

a.

2.25 m/s

b.

1.0 m/s

c.

3.0 m/s

d.

1.5 m/s

Edit

Question 1199

Question MCQ▾

A parallel beam of monochromatic light is incident on a narrow rectangular slit of width 1mm. When the diffraction pattern is seen on a screen placed at a distance of 2m. The width of principal maxima is found to be 2.5 mm. The wave length of light is-

Choices

Choice (4)Response

a.

6250 nm

b.

6000 nm

c.

5890 nm

d.

6200 nm

Edit

Question 1200

Question MCQ▾

If m is mass of electron, v its velocity, r the radius of stationary circular orbit around a nucleus with charge Ze, then from Bohr՚s first postulate, the kinetic energy of the electron in C. G. S system is equal to.

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 1201

Question MCQ▾

A wire of cross sectional area 4mm2 is just stretched between two fixed points at a temperature of 20°C. Determine the tension when the temperature falls to 20°C. Coefficient of linear expansion a = 10-5 /°C and Y = 2 × 1011 N/m2 .

Choices

Choice (4)Response

a.

220 N

b.

160 N

c.

120 N

d.

120 KN

Edit