WORK AND ENERGY class IX Science online test(easy)

Standard IX Science

2.WORK AND ENERGY

 

1. Q.1.The potential energy of your body is least when you are ..................
   
   1.   sleeping on the groun
   2.   sitting on a chair
   3.   sitting on the ground
   4.   standing on the ground
2. Q2.The joule is the unit of ..........
   1.   force
   2.   work, energy
   3.   power
   4.   above all
3. Q3.Work done ..........
   1.   can be positive,negative or zero
   2.   is always positive
   3.   is always negative
   4.   can never be zero
4. Q.4.The SI unit of work is the ..........
   1.   erg
   2.   joule
   3.   dyne
   4.   kilogram
5. Q.5.The CGS unit of energy is the ..........
   1.   joule
   2.   dyne
   3.   kilogram
   4.   erg
6. Q 6. the kinetic energy of a body of mass 2 kg moving with a velocity of 2 m/s is ...........
   1.   4J
   2.   8J
   3.   2J
   4.   16J
7. Q. 7 Power is the .............
   1.   rate of change of momentum
   2.   rate of doing work
   3.   product of force and displacement
   4.   capacity to do work
8. Q 8. Power is a scalar quanty.
   1.   True
   2.   False
9. Q 9.. The kilowatt-hour is a unit of energy.
   1.   True
   2.   False
10. Q.10 Work,Energy,Power,Force {find odd one out.}
    1.   Work
    2.   Energy
    3.   Power
    4.   Force