Work, Energy and Power [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 17 - 21 of 230
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Question 17
Question MCQ▾
In an elastic collision-
Choices
Choice (4) | Response | |
---|---|---|
a. | Momentum is conserved but kinetic energy is not conserved | |
b. | Momentum is not conserved but kinetic energy is conserved | |
c. | Neither momentum nor kinetic energy is conserved | |
d. | the momentum and kinetic energy are conserved |
Question 18
Question MCQ▾
The work done in lifting water from a well of depth 6 m using a bucket of mass 0.5 kg and volume 2 liter, will be
Choices
Choice (4) | Response | |
---|---|---|
a. | 117.6 J | |
b. | 73.5 J | |
c. | 147 J | |
d. | 98 J |
Question 19
Question MCQ▾
A slow moving electron collides elastically with a hydrogen atom at rest. The initial and final motions are along the same straight line. What fraction of electron՚s kinetic energy is transferred to the hydrogen atom? The mass of hydrogen atom is 1850 times the mass of electron.
Choices
Choice (4) | Response | |
---|---|---|
a. | 0.217% | |
b. | 0.0217% | |
c. | 21.7% | |
d. | 2.17% |
Question 20
Question MCQ▾
A body of mass M splits into two parts αM and (1 - a) M by an internal explosion, which generates kinetic energy T After explosion if the two parts move in the same direction as before, their relative speed will be –
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 21
Question MCQ▾
A particle moving in a straight line is acted by a force, which works at a constant rate and changes its velocity from u to v in passing over a distance x. The time taken will be –
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |