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PHYSICS QUESTION
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Exam study book Concepts Of Physics of Harish Chandra Verma - ISBN: 9788177092325 (PHYSICS QUESTION)
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8/23/2021 UT-1 Physics (XI) 2021-22UT-1 Physics (XI) 2021-22
Time Allowed: 1 Hr. M.Marks: 25
General Instructions:
1. All questions are compulsory.
2. Each question carry 1 mark.
1. The displacement of a particle is represented by the following equation: S =
9t2+ 7t + 5 where S is in meter and t in second. The acceleration of the particle
at t = 15 is
(1 Point)
(a) 14 m/s2
(b) 18 m/s2
(c) 32 m/s2
(d) zero
2. The surface tension of a liquid is 70 dyne/cm. In MKS system its value is? *
(1 Point)
(a) 70 N/m
(b) 7 ✕ 10-2 N/m
(c) 7 ✕ 10 2 N/m
(d) 7 ✕ 10 3 N/m
3. The acceleration of a moving object can be found from
(1 Point)
https://forms.office.com/Pages/ResponsePage.aspx?id=-0OjDoCvkEixqah-6gXAgvR1EPbBF6pMhWHSKSUNBWFUNDY2QTNTRVo2T1FTSVF… 1/8
, 8/23/2021 UT-1 Physics (XI) 2021-22
(a) area under displacement-time graph
(b) slope of displacement-time graph
(c) area under velocity-time graph
(d) slope of velocity-time graph
4. Light year is a unit of
(1 Point)
(a) time
(b) distance
(c) sunlight intensity
(d) mass
5. An object accelerated downward under the influence of force of gravity. The
motion of object is said to be
(1 Point)
(a) uniform motion
(b) free fall
(c) non uniformly accelerated motion
(d) None of these
6. Assertion: A body may be accelerated even when it is moving uniformly.
Reason: When direction of motion of the body is changing, the body must
have acceleration.
(1 Point)
(a) Assertion is correct, reason is correct; reason is a correct explanation for
assertion.
(b) Assertion is correct, reason is correct; reason is not a correct explanation for
assertion
(c) Assertion is correct, reason is incorrect
https://forms.office.com/Pages/ResponsePage.aspx?id=-0OjDoCvkEixqah-6gXAgvR1EPbBF6pMhWHSKSUNBWFUNDY2QTNTRVo2T1FTSVF… 2/8
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