WorksheetsK-12 Activity Online quiz
Total questions: 25
Worksheet time: 13mins
Which of the following statements is not correct for an object, moving along a straight path in an accelerated motion?
Its speed keeps changing
Its velocity always changes
It always goes away from the Earth
A force is always acting on it
A goalkeeper in a game of football pulls his hands backward after holding the ball shot, at the goal. This enables the goalkeeper to
Exert larger force on the ball
Reduce the force exerted by the balls on the hands
Increase the rate of change of momentum
Decrease the rate of change of momentum
An iron sphere of mass 10 kg has the same diameter as an aluminum sphere of mass is 3.5 kg. Both spheres are dropped simultaneously from a tower. When they are 10 m above the ground, they have the same.
Acceleration
Momentum
Potential energy
Kinetic energy
When a body falls freely towards the earth, then its total energy
Increases
Decreases
remains constant
First increases and then decreases
In case of negative work, the angle between the force and displacement is:-
0°
45°
90°
180°
Which one of the following is not the unit of energy?
Joule
Newton meter
Kilowatt
Kilowatt-hour
The work done on an object does not depend upon the:-
Displacement
Force applied
The angle between force and displacement
The initial velocity of the object
Water stored in a dam possesses?
No energy
Electrical energy
Kinetic energy
Potential energy
Which are the three main components of fire triangles?
A. Fuel, Chemical reaction & Oxygen
A. Fuel, Heat & oxygen
A. Fuel, Temp & Gas
A. Fuel, Temp & Chemical reaction
The reason which R-22 is banned in refrigeration & air-conditioning?
A. It increases Ozone in the air
A. It destroys Ozone Layer
A. It is highly flammable
A. It is harmful to the personal.
How does an oxygen concentrator work?
It abstract the oxygen from the atmosphere Air
It abstracts the nitrogen from the Air
It produces oxygen by the chemical reaction
It produces fresh Air
Name the accessory to be used in the oxygen cylinder for reducing the pressure?
A. Pressure regulating valve
Ball Valve
A. Balancing Valve
A. Check Valve
Which force is responsible to keep an object float, in the fluid?
Gravitational Force
Buoyant Force
Frictional Force
None of the above
What is LPG (Used in domestic kitchen cylinder?)
Liquified Propane Gas
light propane Gas
Liquefied Petroleum Gas
Light petroleum Gas
The study of animals is known as?
Ecology
Zoology
Cytology
Anthropology
By which gas plants prepare their food(Photosynthesis):-
CO2
O2
N2
None of the above
Which is required for traveling of Sound?
A. Water
Air
Vaccum
None of the above
Which is the Indian vaccine for corona virus Disease?
Covaxin
Sputnik
AstraZeneca
None of the Above
Which force is described in the rolling of a marble?
A. Friction force
A. Gravitation force
A. Buoyancy force
A. None of the above
What is a Cell?
The smallest unit of a body
Smallest nerves of the body
Smallest organ of the body
Smallest particle
What does the product of time & speed give?
Distance
Velocity
Acceleration
Momentum
What Causes Day & Night?
Earth’s rotation on its axis.
A. Earth rotation around the sun
A. Moon rotation around the earth
A. Sun and Moon rotation
Which is the biggest sense organ?
Skin
Nose
Eye
Ear
Which is the biggest artery in the human body?
Aorta
Carotid
Subclavian
femoral
What is the element symbol for common salt?
KCl
NaOH
HCl
NaCl
