1. a.
C.
Give short answer to the following questions
The gravitational force between two unit masses which are separated by a unit distance is
1
called universal gravitational constant.
b.
Pascal's law of liquid pressure states that if pressure is applied at a point in a closed container
1
having liquid it transmits pressure equally in all directions.
There are two types of energy soures:
(i) Renewable soruces of energy.
0.5
(ii) Non-renewable sources of energy.
0.5
d. The defect of vision in which a person can see the nearby objects clearly but cannot see the
distant object clearly is called myopia. The image of the distant object is formed in front of
the retina.
1
1 kilowatt-hour of electrical energy is the work done by the current at the rate of 1000
joules per second for an hour.
1
e.​