Class 11 Physics, Physics Unit Test, Gravitation, Units and Measurements, Physics Test Paper, 11th Science Notes, Class 11 Science, Physics Important Questions, Physics Exam Paper, Newton’s Law of Gravitation, Acceleration due to gravity, Dimensional Anal

First Unit test
Std. 11 th
Subject : Physics
(science) Topic : Unit and its
(25
measurement
: Gravitation marks)


Q.1) Select correct alternatives (each 1 Mark)

1) Above the earth surface at a height `h` acceleration due to
gravity. (Ans= b)

a) 9.8m/s2 b) less than 9.8m/s2 c) greater than
9.8m/s2 d) none of these

2) At a depth ,d, inside the earth acceleration due to gravity.
( Ans=b)

a) 9.8m/s2 b) less than9.8m/s2 c) greater than 9.8m/s2
d) none of these

3) The Dimension of Force. (Ans=a)

a) [M1L1T-2] b) [M0L1T-1] c) [M2L1T-1]
d) [M1L2T-3]

4) The Dimension of work. (Ans=a)

a) [M1L2T-2] b) [M0L1T-1] c) [M1L2T3]
d) [M2L1T-1]

5) The difference between the true value and measured value is
called. (Ans= b)

a) mistake b) error c) fault
d) none of these



Q.2) Solve following questions. (each 2 marks)

1) State any four example of fundamental physical
quantity:

Ans: Four examples are Length, Mass, Time, Temperature.

2) State and explain Newton’s law of gravitations:

Ans: Every particle in the universe attracts every other particle with a
force directly proportional to the product of their masses and inversely
proportional to the square of the distance between them.
m1 m2
F=G 2
r