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
Choices
Choice (4) | Response | |
---|---|---|
a. | 2.25 m/s | |
b. | 1.0 m/s | |
c. | 3.0 m/s | |
d. | 1.5 m/s |
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 |
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. |
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 |